Phase behavior of tetramethylurea + MCl (M = Na, K, Rb, Cs) + H2O systems at 288.2, 298.2 and 308.2 K
Publication date: Available online 21 January 2020Source: The Journal of Chemical ThermodynamicsAuthor(s): Xiaoyue Cao, Yahui Chang, Shuni Li, Quanguo Zhai, Yucheng Jiang, Mancheng HuAbstractFor this article, we investigated the phase behavior and physicochemical properties of the ternary systems MCl (M = Na, K, Rb, Cs) + tetramethylurea (TMU) + H2O at temperatures of 288.2, 298.2 and 308.2 K. For (solid – liquid) equilibrium (SLE) systems (NaCl/KCl/RbCl + TMU + H2O at three temperatures and CsCl + TMU + H2O at 288.2 K), the density, solubility and refractive index about the saturated solutions was obtained. About (l...
Source: The Journal of Chemical Thermodynamics - January 21, 2020 Category: Chemistry Source Type: research

Thermodynamic investigation of the Ruddlesden-Popper phase Sr3Fe2O7
Publication date: Available online 20 January 2020Source: The Journal of Chemical ThermodynamicsAuthor(s): A.V. Knyazev, Yu.V. Alekseeva, N.N. Smirnova, O.V. Krasheninnikova, A.V. Markin, E.V. Syrov, E.V. Elipasheva, L.V. SmirnovaAbstractThe heat capacity of layered perovskite-like oxide Sr3Fe2O7 was measured for the first time by precision adiabatic vacuum calorimetry over the temperature range of (6–305) K and by differential scanning calorimetry in the range from 300 K to 420 K. The standard thermodynamic functions of the compound were evaluated from the experimental heat capacity temperature dependences over the ...
Source: The Journal of Chemical Thermodynamics - January 20, 2020 Category: Chemistry Source Type: research

Molecular mechanism of the clathrate cage formation in structure-Ⅱ cyclopentane hydrate: an ab initio study
Publication date: Available online 18 January 2020Source: The Journal of Chemical ThermodynamicsAuthor(s): Jing Wen, Yongsheng Zhang, Wanru Zhou, Yuanyuan Fu, Weilong Zhao, Wei ShengAbstractTo understand the nucleation mechanism and formation process of CP hydrate cage, the structure and stability of CP hydrate cage, the effect of CP molecule on gas molecules adsorption were studied by the method of ab initio molecular dynamics simulation. The results show that CP molecule prefers to be parallel to the water ring One hexagonal face is formed as the cage precursor, and gradually develop into a complete 51264 cage. The stabi...
Source: The Journal of Chemical Thermodynamics - January 19, 2020 Category: Chemistry Source Type: research

Thermochemistry of di-substituted benzenes: nitro- and dimethylamino benzaldehydes
Publication date: Available online 19 January 2020Source: The Journal of Chemical ThermodynamicsAuthor(s): Riko Siewert, Aizat A. Samatov, Ruslan N. Nagrimanov, Sergey P. VerevkinAbstractStandard molar enthalpies of vaporization/sublimation (check for euro journal) of nitro and amino-substituted benzaldehydes were obtained from the temperature dependence of vapour pressure measured by the transpiration method. Enthalpies of fusion of these compounds were measured by using DSC. Solution enthalpies of nitro and amino-substituted benzaldehydes were measured by using a solution calorimeter. Available from literature primary ex...
Source: The Journal of Chemical Thermodynamics - January 19, 2020 Category: Chemistry Source Type: research

Thermodynamic characteristics of Li2MoO4, Li2W0.85Mo0.15O4 single crystals and stability direction for alkali molybdates
Publication date: Available online 14 January 2020Source: The Journal of Chemical ThermodynamicsAuthor(s): N.I. Matskevich, V.N. Shlegel, A.L. Sednev, A.N. Semerikova, V.P. Zaitsev, V.A. Kuznetsov, A.Yu. Novikov, A.Yu. ZuevAbstractSingle crystals of Li2MoO4 and Li2W0.85Mo0.15O4, as perspective materials to search for neutrino-less double beta decay, have been grown by low-temperature-gradient Czochralski technique (LTG CZ). The standard formation enthalpies for single crystals of Li2MoO4 and Li2W0.85Mo0.15O4 have been determined by two methods: (i) solution calorimetry in KOH (ΔfH0 (Li2MoO4, s, 298.15K) = −(152...
Source: The Journal of Chemical Thermodynamics - January 15, 2020 Category: Chemistry Source Type: research

Liquid organic hydrogen carriers: hydrogen storage by di-phenyl ether derivatives: an experimental and theoretical study
Publication date: Available online 13 January 2020Source: The Journal of Chemical ThermodynamicsAuthor(s): Sergey P. Verevkin, Andrey A. Pimerzin, Li-Xian SunAbstractThe liquid organic hydrogen carriers (LOHCs) are promising materials for hydrogen storage. The standard molar enthalpies of formation, ΔfHmo(liq/cr) of diphenyl ether substituted with amino substituents were measured by the high-precision combustion calorimetry. Enthalpies of vaporisation/sublimation Δl,crgHmo(298.15 K) of these compounds were obtained by the transpiration method. Enthalpies of fusion were measured by DSC. Gas-phase enthalpies of f...
Source: The Journal of Chemical Thermodynamics - January 13, 2020 Category: Chemistry Source Type: research

Measurement and correlation of the (p, ρ, T) behaviour of liquid ethylene glycol at temperatures from (283.3 to 393.1) K and pressures up to 100.1 MPa
Publication date: Available online 11 January 2020Source: The Journal of Chemical ThermodynamicsAuthor(s): Xiaoxian Yang, Catherine C. Sampson, Ophelia Frotscher, Markus RichterAbstractThe (p, ρ, T) behaviour of ethylene glycol was investigated over the temperature range from T = (283.3 to 393.1) K at pressures from p = (4.8 to 100.1) MPa utilizing a high-pressure vibrating-tube densimeter. This work extends the current data situation for the density of ethylene glycol with respect to temperature and pressure ranges. Four mathematical models for the vibrating-tube densimeter were used to calculate density from the...
Source: The Journal of Chemical Thermodynamics - January 12, 2020 Category: Chemistry Source Type: research

Thermophysical properties of switchable-hydrophilicity solvent systems: N,N-Dipropyl-1-propanamine, water and carbon dioxide
Publication date: Available online 11 January 2020Source: The Journal of Chemical ThermodynamicsAuthor(s): Jian Wang, Xin Yuan, Hongkun Zhao, Yaqiong Wang, Xuedong Zhu, Xuhong Guo, Jean-Noël JaubertAbstractMeasurements of density, viscosity, refractive index and conductivity of a switchable hydrophilicity solvent (SHS) system (N,N-dipropyl-1-propanamine (TPA), water, and carbon dioxide) have been carried at (283.15-308.15) K and 0.1 MPa. The derived parameters, such as apparent molar volume of solute, limiting apparent molar volume of solute, Masson’s coefficient SV, molar refraction and limiting molar conductiv...
Source: The Journal of Chemical Thermodynamics - January 12, 2020 Category: Chemistry Source Type: research

Heat capacity and thermodynamic properties of alkali and alkali-earth borohydrides
Publication date: Available online 10 January 2020Source: The Journal of Chemical ThermodynamicsAuthor(s): Erika M. Dematteis, Steffen R. Jensen, Torben R. Jensen, Marcello BariccoAbstractIn this work, the above room temperature heat capacity for different polymorphs of alkali and alkali-earth (i.e. Na, K, Rb, Cs, Mg, Ca) borohydrides has been measured by DSC as a function of temperature. The above room temperature measured Cp values have been compared with available extrapolated literature data, and they have been modelled as a function of temperature according to the Calphad method. The variations of Cp values for differ...
Source: The Journal of Chemical Thermodynamics - January 11, 2020 Category: Chemistry Source Type: research

Measurement and correlation of thermophysical properties in aqueous solutions of some novel bio-based deep eutectic solvents (lactic acid/amino acids) at T = (298.15 to 313.15) K
Publication date: Available online 9 January 2020Source: The Journal of Chemical ThermodynamicsAuthor(s): Masumeh Mokhtarpour, Hemayat ShekaariAbstractThermodynamic properties of novel bio-based deep eutectic solvents (DESs) and their mixture with other solvents would be of great importance in extraction and pharmaceutical sciences. In the present study new class of these neoteric sustainable solvents composed of amino acids and lactic acid were prepared, density and speed of sound data for neat lactic acid/alanine, lactic acid/glycine and lactic acid/histidine and their aqueous mixture were measured over the entire compos...
Source: The Journal of Chemical Thermodynamics - January 11, 2020 Category: Chemistry Source Type: research

Liquid–Liquid Equilibria of the ternary system (cyclopentanol + water + cyclopentyl formate) at (298.2 - 338.2) K: Measurements and correlation
Publication date: Available online 10 January 2020Source: The Journal of Chemical ThermodynamicsAuthor(s): Tomáš Sommer, Martin Zapletal, Jiří TrejbalAbstractCyclopentanol is an important intermediate in a production of many chemical specialties. This paper relates to a development of a new technology of indirect cyclopentene hydration in the presence of formic acid and presents the data of liquid–liquid equilibrium (LLE) for the ternary system (cyclopentanol + water + cyclopentyl formate) under atmospheric pressure and within a temperature range from 298.2 K to 338.2 K. The experiments were con...
Source: The Journal of Chemical Thermodynamics - January 11, 2020 Category: Chemistry Source Type: research

Thermophysical and volumetric properties of mixtures {carvacrol + ethanol} at several temperatures and atmospheric pressure
Publication date: April 2020Source: The Journal of Chemical Thermodynamics, Volume 143Author(s): José F. Martínez-López, Juan I. Pardo, José S. Urieta, Ana M. MainarAbstractExperimental molar heat capacities at atmospheric pressure have been determined for the mixture {carvacrol + ethanol} every 10 K in the temperature interval (298.15–328.15) K and over the entire composition range with a Calvet type calorimeter. Densities, necessary for determining isobaric heat capacities, and ultrasonic speed of sound have been also measured at the same conditions. From these properties ...
Source: The Journal of Chemical Thermodynamics - January 11, 2020 Category: Chemistry Source Type: research

Excess molar volumes of cyclohexanone with n-, sec-, or tert-butylbenzene: Application of the PFP theory and Graph-theoretical approach
Publication date: Available online 8 January 2020Source: The Journal of Chemical ThermodynamicsAuthor(s): Dongwei Wei, Mengying Li, Jing Ma, Baohe WangAbstractExcess molar volumes, VE, for the binary mixtures of cyclohexanone with n-, sec-, or tert-butylbenzene were measured over the entire composition range at (298.15, 303.15, 308.15 and 313.15) K and 0.1 MPa, by means of a vibrating-tube densimeter. VE data are sigmoid shape for the studied mixtures of cyclohexanone + n-butylbenzene (with negative VE values at lower mole fractions of cyclohexanone) and negative for the mixtures of cyclohexanone + sec-butylbenzene, and cy...
Source: The Journal of Chemical Thermodynamics - January 9, 2020 Category: Chemistry Source Type: research

Expanding thermodynamic databases using the thermodynamic difference rule (TDR). Exemplified by an application to retrieve new thermodynamic data for thorium compounds
Publication date: Available online 7 January 2020Source: The Journal of Chemical ThermodynamicsAuthor(s): H. Donald Brooke JenkinsAbstractThis paper explores the thermochemistry of thorium compounds, in particular their hydrates MpXq.nH2O and their corresponding parents, MpXq. By taking currently available thermochemical data from the literature, we use the Thermodynamic Difference Rule (TDR) to illustrate how we can retrieve new (previously missing) data without necessitating calorimetric investigation. Moreover the results obtained are likely to have a level of accuracy and precision equal to that obtained using traditio...
Source: The Journal of Chemical Thermodynamics - January 8, 2020 Category: Chemistry Source Type: research

Heat capacity and thermodynamic functions of TiO2(H)
Publication date: Available online 8 January 2020Source: The Journal of Chemical ThermodynamicsAuthor(s): Tao Feng, Liping Li, Quan Shi, Yuelan Zhang, Guangshe LiAbstractThe heat capacity of TiO2(H) has been measured in the temperature range of 1.9 K to 302 K. The experimental heat capacity is fitted using theoretical models, orthogonal polynomials and combination of Debye and Einstein function for the low, middle and high temperature range, respectively. Based on these fitted results, the standard molar heat capacity, entropy, enthalpy and Gibbs energy are calculated as (55.51 ± 0.56) J·K-1·mol-1, (50...
Source: The Journal of Chemical Thermodynamics - January 8, 2020 Category: Chemistry Source Type: research

Editorial Board
Publication date: January 2020Source: The Journal of Chemical Thermodynamics, Volume 142Author(s): (Source: The Journal of Chemical Thermodynamics)
Source: The Journal of Chemical Thermodynamics - January 8, 2020 Category: Chemistry Source Type: research

Determination and correlation of ternary isobaric vapour-liquid equilibrium data of (dimethyl succinate+ dimethyl glutarate+ dimethyl adipate) at 2, 5and 8kPa
Publication date: Available online 3 January 2020Source: The Journal of Chemical ThermodynamicsAuthor(s): Chunli Zhi, Yang Tang, Jinru Wan, Xingming Liu, Honglin Chen, Xunqiu WangAbstractIsobaric vapour-liquid equilibrium data of {dimethyl succinate (DMS) + dimethyl glutarate (DMG) + dimethyl adipate (DMA)} ternary system was measured at 2 kPa, 5 kPa and 8 kPa with a dynamic recirculating apparatus and the temperature ranged from 364.46 to 403.55K. The experimental data was correlated with NRTL, Wilson and Uniquac models. The results showed that the maximum value of the root mean square deviation of the vapour phase mole f...
Source: The Journal of Chemical Thermodynamics - January 5, 2020 Category: Chemistry Source Type: research

Study of solvation behaviour and interactions of drug betaine hydrochloride in aqueous-D-xylose/L-arabinose solutions at different temperatures by using volumetric, acoustic and viscometric methods
Publication date: Available online 2 January 2020Source: The Journal of Chemical ThermodynamicsAuthor(s): Ankita, Anil Kumar NainAbstractThe densities, ρ, ultrasonic speeds, u and viscosities, η of the drug betaine hydrochloride in water and in aqueous−D-xylose/L-arabinose (5wt% and 10 wt% D-xylose/L-arabinose in water) solvents at various temperatures (293.15−318.15) K and at atmospheric pressure of 101 kPa have been measured by using digital vibrating tube density and sound analyser and micro viscometer. The experimental data have been used to evaluate the apparent molar volumes, Vϕ, limiting apparen...
Source: The Journal of Chemical Thermodynamics - January 3, 2020 Category: Chemistry Source Type: research

Maraviroc in aqueous co-solvent solutions of n-propanol, ethanol, dimethyl sulfoxide and N,N-dimethylformamide: solubility determination, preferential solvation and solvent effect analysis
Publication date: Available online 2 January 2020Source: The Journal of Chemical ThermodynamicsAuthor(s): Wentian Li, Peilin Ji, Yuyuan Xu, Ali Farajtabar, Xinbao Li, Hongkun ZhaoAbstractThe liquid-solid equilibrium and solubility of maraviroc in co-solvent mixtures of n-propanol, ethanol, dimethyl sulfoxide (DMSO) and N,N-dimethylformamide (DMF) plus water was obtained via the saturation shake-flask technique between 278.15 K and 323.15 K under 101.2 kPa. For the four aqueous co-solvent mixtures investigated, the mole fraction solubility of maraviroc increased with the increase in the temperature and mass fraction of n-pr...
Source: The Journal of Chemical Thermodynamics - January 3, 2020 Category: Chemistry Source Type: research

Surface tension of binary mixtures composed of N, N-dimethylcyclohexylamine and alcohols at different temperatures
Publication date: Available online 31 December 2019Source: The Journal of Chemical ThermodynamicsAuthor(s): Dan Zhao, Yun Zhuang, Chunshan Fan, Fang Yang, Yuhuan Chen, Xihui ZhangAbstractSurface tension (γ) for five binary mixtures containing N, N-dimethylcyclohexylamine (DMCA) and alcohol, ethanol, n-propanol, iso-propanol, n-butanol or iso-butanol were measured over the whole range of composition at 0.1 MPa and different temperatures ranging from (288.15 to 308.15) K. From the experimental data, the surface tension deviations (δγ) for the binary mixtures were calculated. The δγ values are po...
Source: The Journal of Chemical Thermodynamics - January 2, 2020 Category: Chemistry Source Type: research

Experimental Thermochemical Data of CWA Simulants: Triethyl Phosphate, Diethyl Methylphosphonate, Malathion and Methyl Salicylate
Publication date: Available online 31 December 2019Source: The Journal of Chemical ThermodynamicsAuthor(s): Greta Bikelytė, Martin A.C. Härtel, Thomas M. Klapötke, Burkhard Krumm, Audrius SadaunykasAbstractThis work focuses on the determination of important thermochemical properties of several chemical warfare agent (CWA) simulants: diethyl methylphosphonate (DEMP, CAS 683-08-9, 1), triethyl phosphate (TEP, CAS 78-40-0, 2), malathion (CAS 121-75-5, 3) and methyl salicylate (MS, 119-36-8, 4). Enthalpies of vaporization ΔlgHmo. (298.15 K) (1: 56.8±0.8 kJ mol-1; 2: 63.9±0.9 kJ mol-1; 3: 101.4&pl...
Source: The Journal of Chemical Thermodynamics - January 2, 2020 Category: Chemistry Source Type: research

Thermophysical and volumetric properties of mixtures {carvacrol + ethanol} at several temperatures and atmospheric pressure
Publication date: Available online 31 December 2019Source: The Journal of Chemical ThermodynamicsAuthor(s): José F. Martínez-López, Juan I. Pardo, José S. Urieta, Ana M. MainarAbstractExperimental molar heat capacities at atmospheric pressure have been determined for the mixture {carvacrol + ethanol} every 10 K in the temperature interval (298.15-328.15) K and over the entire composition range with a Calvet type calorimeter. Densities, necessary for determining isobaric heat capacities, and ultrasonic speed of sound have been also measured at the same conditions. From these properties isobaric t...
Source: The Journal of Chemical Thermodynamics - January 2, 2020 Category: Chemistry Source Type: research

Thermodynamic solubility, solvent effect and preferential solvation analysis of rebamipide in aqueous co-solvent mixtures of propylene glycol, n-propanol, isopropanol and ethanol
Publication date: Available online 31 December 2019Source: The Journal of Chemical ThermodynamicsAuthor(s): Wanxin Li, Ali Farajtabar, Rong Xing, Yiting Zhu, Hongkun Zhao, Rongguan LvAbstractMole fraction solubility of rebamipide (R- and S-enantiomer mixtures with a mole ratio of 50:50) in mixtures of propylene glycol (PG, 1) + water (2), n-propanol (1) + water (2) , isopropanol (1) + water (2) and ethanol (1) + water (2) was reported at temperature range from (273.15 to 318.15) K. All experiments were made by the use of the isothermal saturation technique under ambient pressure of 101.2 kPa. At the same mass fraction prop...
Source: The Journal of Chemical Thermodynamics - January 2, 2020 Category: Chemistry Source Type: research

Solid-liquid stable phase equilibria of the quaternary system Na+ //Cl−, SO42−, CO32−-H2O and its subsystems Na+ //Cl−, CO32−-H2O and Na+ //SO42−, CO32−-H2O at 353.15 K
Publication date: April 2020Source: The Journal of Chemical Thermodynamics, Volume 143Author(s): Shao-Ying Ge, Li Zhu, Yu-Long Ma, Er Liu, Kang-he ZhaoAbstractThe solid-liquid phase equilibria of the solution in the quaternary system Na+ //Cl−, SO42−, CO32−-H2O and its subsystems Na+ //Cl−, CO32−-H2O and Na+ //SO42−, CO32−-H2O at 353.15 K were measured by isothermal solution saturation method. The equilibrium solids were determined by the Schreinemaker's method of wet residues and X-ray diffraction (XRD). Based on the experimental data, the phase diagrams were plotted and anal...
Source: The Journal of Chemical Thermodynamics - December 29, 2019 Category: Chemistry Source Type: research

Cosolvent action of promethazine hydrochloride in (ethyl acetate + alcohols) and thermodynamic property analysis
This study presents the solubility profiles of promethazine hydrochloride in pure and mixed solvents. The effects of temperature and composition of mixed solvents on solubility were investigated. Maximum solubility value was obtained in n-propanol in pure solvents, and in ethyl acetate, it is the lowest. While in two mixtures of ethyl acetate (1-w) + ethanol (w, mass fraction) and ethyl acetate (1-w) + isopropanol (w), the values increased monotonically with the increasing temperature, and increased with increasing co-solvent (alcohols) mass fraction (w) to a maximum value at w = 0.4 and then decreased. The interaction bet...
Source: The Journal of Chemical Thermodynamics - December 24, 2019 Category: Chemistry Source Type: research

The dissolution behavior and apparent thermodynamic analysis of propacetamol hydrochloride in pure and mixed solvents
Publication date: Available online 19 December 2019Source: The Journal of Chemical ThermodynamicsAuthor(s): Yüfang Wu, Yuancong Wu, Xiaolu ZhangAbstractIn order to study the solubility of the formed solute in the reaction solvent, the solubility of propacetamol hydrochloride (PRO) in pure and mixed solvents was experimentally determined at T = 273.15-313.15K. In all selected pure solvents, the solubility data form high to low was followed by the sequence: methanol> ethanol> acetone> n-propanol> isopropanol> acetonitrile. In mixture of (acetone + ethanol), the solubility decreased monotonically with the ...
Source: The Journal of Chemical Thermodynamics - December 20, 2019 Category: Chemistry Source Type: research

Solid-liquid phase equilibria of quaternary systems Na+//Cl−, CO32−, SO42− - H2O and Na+//Cl−, CO32−, NO3− - H2O at T = 313.15 K
Publication date: Available online 14 December 2019Source: The Journal of Chemical ThermodynamicsAuthor(s): Jing Cao, Yongsheng Ren, Bingjie Yu, Qiunan Zhu, Yujia ZhangAbstractThe solid-liquid equilibrium of quaternary systems (Na+//Cl−, CO32−, NO3− -H2O) and (Na+//Cl−, CO32−, SO42− -H2O) at 313.15 K was studied by an isothermal solution saturation method and the solubility of salts and equilibrium solid phases in the two systems was determined. The solid phases formed in the systems studied were determined by the Schreinemaker wet residue method. Based on the measured data, dry-salt p...
Source: The Journal of Chemical Thermodynamics - December 15, 2019 Category: Chemistry Source Type: research

Experimental and modeling study of Diisopropyl ether and 2-alkanol; PC-SAFT model and Free Volume Theory
Publication date: Available online 14 December 2019Source: The Journal of Chemical ThermodynamicsAuthor(s): Simin Ahmadi, Mohammad AlmasiAbstractIn the present study, with the aim to discover the governing interactions in binary mixtures containing diisopropyl ether and short-range 2-alkanol (from 2-propanol to 2-hexanol), experimental values of density and viscosity at temperature range 293.15 K to 323.15 K were reported. From these data, values of excess molar volume, partial molar volume, and viscosity deviation for mentioned systems were calculated. Findings show that strong interactions occur among unlike molecules wh...
Source: The Journal of Chemical Thermodynamics - December 15, 2019 Category: Chemistry Source Type: research

Volumetric properties, viscosity and taste behavior of MDMA-HCl in aqueous binary and (water + D-lactose) ternary mixtures at different temperatures
Publication date: Available online 14 December 2019Source: The Journal of Chemical ThermodynamicsAuthor(s): Marija Petrin Miličević, Sanja Belić, Milan Vraneš, Aleksandar Tot, Nataša Radosavljević Stevanović, Dušica Rakić, Slobodan GadžurićAbstractExperimental measurements of density and viscosity of 3,4-methylenedioxymethamphetamine hydrochloride (MDMA-HCl) in aqueous binary and in (water + D-lactose) ternary mixtures have been investigated in different temperature and molality ranges: from (293.15 to 313.15) K and from (0.05 to 0.5) mol·kg–1. In order to study interactions betwee...
Source: The Journal of Chemical Thermodynamics - December 15, 2019 Category: Chemistry Source Type: research

Thermodynamic properties of the C70(OH)12 fullerenol in the temperature range T = 9.2 K to 304.5 K
Publication date: Available online 14 December 2019Source: The Journal of Chemical ThermodynamicsAuthor(s): Nikita E. Podolsky, Maxim I. Lelet, Sergei V. Ageev, Andrey V. Petrov, Anton S. Mazur, Nailia R. Iamalova, Dmitry N. Zakusilo, Nikolay A. Charykov, Lubov V. Vasina, Konstantin N. Semenov, Igor V. MurinAbstractThe paper is devoted to thermodynamic investigation of polyhydroxylated fullerene C70(OH)12. The measurement of fullerenol’s isobaric heat capacity in the temperature range T = 9.2 K–304.5 K was performed, as well as the standard thermodynamic functions: Sm°, [Hm°(T) − Hm°(0)] ...
Source: The Journal of Chemical Thermodynamics - December 14, 2019 Category: Chemistry Source Type: research

Densities for carbon dioxide/cyclohexane, methylcyclohexane, and ethylbenzene systems
Publication date: January 2020Source: The Journal of Chemical Thermodynamics, Volume 142Author(s): Hiroaki Matsukawa, Ken Kuwabara, Yuichiro Shimada, Tomoya Tsuji, Katsuto OtakeAbstractThe density of homogeneous phase fluid mixtures for various carbon dioxide (CO2)/organic solvent systems was measured in homogeneous phase. Solvents included cyclohexane (C6H12), methylcyclohexane (C6H11CH3), and ethylbenzene (C6H5C2H5). Density measurements were performed using a high-pressure vibration type density meter equipped with a circulation pump and variable volume viewing cell which guarantee the homogeneity of mixtures. The densi...
Source: The Journal of Chemical Thermodynamics - December 13, 2019 Category: Chemistry Source Type: research

Phase equilibria of tetra-iso-amyl ammonium bromide (TiAAB) semiclathrates with CO2, N2, or CO2 + N2
This study examined the thermodynamic stability and guest gas inclusion of tetra-iso-amyl ammonium bromide (TiAAB) semiclathrates with CO2, N2, or CO2 (20%) + N2 (80%), with a primary focus on semiclathrate phase equilibria and Raman spectra. The three-phase (H-LW-V) equilibria of TiAAB semiclathrates with CO2, N2, or CO2 (20%) + N2 (80%) were measured at a stoichiometric concentration (TiAAB 3.7 mol%) using both a conventional isochoric method and a stepwise differential scanning calorimeter (DSC) method. The phase equilibria demonstrated that TiAAB (3.7 mol%) semiclathrates with CO2, N2, or ...
Source: The Journal of Chemical Thermodynamics - December 13, 2019 Category: Chemistry Source Type: research

A comparative study of liquid–liquid equilibria for aqueous mixtures of straight chain and branched chain carboxylic acids with methyl isobutyl carbinol
Publication date: Available online 10 December 2019Source: The Journal of Chemical ThermodynamicsAuthor(s): A. Ghanadzadeh Gilani, F. Amouzadeh, B. Ghalami-ChoobarAbstractLiquid-liquid equilibrium (LLE) data of the (water + butyric or 3-methylbutyric acids + methyl isobutyl carbinol) ternary systems were experimentally obtained at T = (298.2, 303.2, and 308.2) K and P = 0.1 MPa for the first time. Using solubility and tie-line measurements, the triangle phase diagrams were obtained and influence of the chemical structure of the acids on the LLE behaviour was studied. The first ternary aqueous system containing butyric acid...
Source: The Journal of Chemical Thermodynamics - December 10, 2019 Category: Chemistry Source Type: research

Solubility of monobenzone in aqueous co-solvent mixtures of several alcohols: determination, modelling and thermodynamic aspects analysis
Publication date: Available online 7 December 2019Source: The Journal of Chemical ThermodynamicsAuthor(s): Yanyan Zhou, Jiaxin Wu, Ali Farajtabar, Jian Wang, Hongkun ZhaoAbstractInvestigation upon the solubility of monobenzone in aqueous co-solvent mixtures of isopropanol, n-propanol, ethylene glycol (EG) and ethanol was performed via a saturation shake-flask technique at temperatures from 283.15 K to 328.15 K under pressure of p=101.2 kPa. Experimental solubility magnitude presented positive dependence upon the mass fraction of each co-solvent and temperature. The greatest solubility value on the mole fraction scale ...
Source: The Journal of Chemical Thermodynamics - December 7, 2019 Category: Chemistry Source Type: research

Phase equilibria of tetra-iso-amyl ammonium bromide (TiAAB) semiclathrates with CO2, N2, or CO2 + N2
This study examined the thermodynamic stability and guest gas inclusion of tetra-iso-amyl ammonium bromide (TiAAB) semiclathrates with CO2, N2, or CO2 (20%) + N2 (80%), with a primary focus on semiclathrate phase equilibria and Raman spectra. The three-phase (H-LW-V) equilibria of TiAAB semiclathrates with CO2, N2, or CO2 (20%) + N2 (80%) were measured at a stoichiometric concentration (TiAAB 3.7 mol%) using both a conventional isochoric method and a stepwise differential scanning calorimeter (DSC) method. The phase equilibria demonstrated that TiAAB (3.7 mol%) semiclathrates with CO2, N2, or CO2 (20%) + N2 (80%) were sign...
Source: The Journal of Chemical Thermodynamics - December 7, 2019 Category: Chemistry Source Type: research

Thermodynamic phase equilibria in the aqueous ternary system NaCl–NaBO2–H2O: experimental data and solubility calculation using the Pitzer model
Publication date: Available online 6 December 2019Source: The Journal of Chemical ThermodynamicsAuthor(s): Lan Yang, Dan Li, Tao Zhang, Lingzong Meng, Tianlong Deng, Yafei GuoAbstractSolubilities and refractive indices in the ternary system NaCl–NaBO2–H2O at 323.15 K were investigated with the dissolution equilibrium method. The phase diagram of this system consists of three single-salt crystallization regions for NaBO2·4H2O, NaCl·NaBO2·2H2O and NaCl, three univariant solubility curves and two invariant points. A comparison of the diagrams of this system from 288.15 to 323.15 K shows that a...
Source: The Journal of Chemical Thermodynamics - December 7, 2019 Category: Chemistry Source Type: research

A physicochemical and conformational study of co-solvent effect on the molecular interactions between similarly charged protein surfactant (BSA-SDBS) system
Publication date: Available online 5 December 2019Source: The Journal of Chemical ThermodynamicsAuthor(s): Vivek Sharma, Osvaldo Yañez, Melissa Alegría-Arcos, Ashish Kumar, Ramesh C. Thakur, Plinio Cantero-LópezAbstractUse of surfactants in numerous household and industrial processes and their interaction with proteins in our day to day life has made protein-surfactant interactions a booming topic among the researchers of current era. Bovine serum albumin (BSA) being structural homologue to Human Serum albumin (HSA) allowed us to study its binding efficiency with anionic surfactant such as sodium dodec...
Source: The Journal of Chemical Thermodynamics - December 5, 2019 Category: Chemistry Source Type: research

Thermodynamic study of selected monoterpenes IV
Publication date: Available online 3 December 2019Source: The Journal of Chemical ThermodynamicsAuthor(s): Vojtěch Štejfa, Michal Fulem, Květoslav RůžičkaAbstractAn extensive thermodynamic study of three monoterpenes, (−)-menthone, (+)-pulegone, and (−)-isopulegol, is presented in this work. Phase behaviour was investigated by a heat-flux differential scanning calorimetry (DSC) from 183 K resulting in detection of polymorphic behaviour of (−)-isopulegol and a noticeably slow crystallization of (+)-pulegone. Two static apparatus were employed for the vapour pressure measurements over a wide tem...
Source: The Journal of Chemical Thermodynamics - December 4, 2019 Category: Chemistry Source Type: research

Experimental and simulation study of CO2 and H2S solubility in propylene carbonate, imidazolium-based ionic liquids and their mixtures
Publication date: Available online 4 December 2019Source: The Journal of Chemical ThermodynamicsAuthor(s): Zhijun Zhao, Ying Huang, Zhaohuan Zhang, Weiyang Fei, Mingsheng Luo, Yongsheng ZhaoAbstractCurrently, solvent-based absorption is known as an effective technology to capture acid gases,e.g., CO2 or H2S. In this work, the constant-volume method is used to determine CO2 and H2S solubility in propylene carbonate (PC), imidazolium-based ionic liquids (ILs): 1-butyl-3-methylimidazolium tetrafluoroborate [Bmim][BF4], 1-hexyl-3-methylimidazolium tetrafluoroborate [Hmim][BF4], and 1-octyl-3-methylimidazolium tetrafluoroborate...
Source: The Journal of Chemical Thermodynamics - December 4, 2019 Category: Chemistry Source Type: research

Phase behaviour and heat capacities of selected 1-ethyl-3-methylimidazolium-based ionic liquids
Publication date: Available online 30 November 2019Source: The Journal of Chemical ThermodynamicsAuthor(s): Vojtěch Štejfa, Jan Rohlíček, Ctirad ČervinkaAbstractIonic liquids start to leave the position of novel and astonishing compounds and become commercially available in a relatively high purity. Consequently, their thermodynamic properties should be described in a more thorough way than in the times of first pioneering studies revealing the importance of the water content. Available thermodynamic data, however, contradict this assumption keeping large discrepancies even among the data published in the ...
Source: The Journal of Chemical Thermodynamics - December 1, 2019 Category: Chemistry Source Type: research

Speed of sound measurements in liquid methane (CH4) at cryogenic temperatures between (130 and 162) K and at pressures up to 10 MPa
Publication date: January 2020Source: The Journal of Chemical Thermodynamics, Volume 142Author(s): G. Cavuoto, S. Lago, P.A. Giuliano Albo, D. SerazioAbstractThis paper reports speed of sound experimental measurements in liquid methane (CH4) along five isotherms, in the temperature range of (130 and 162) K, and for pressures up to 10 MPa. A dedicated experimental apparatus, custom-designed for accurate speed of sound measurement at cryogenic temperatures and high pressures, has been developed and the double pulse-echo technique has been adopted. In order to characterize this new apparatus and its performance, exp...
Source: The Journal of Chemical Thermodynamics - December 1, 2019 Category: Chemistry Source Type: research

Volumetric, acoustic and viscometric investigation of some choline amino acid ionic liquids in aqueous solutions of polypropylene glycol 400 and polyethylene glycol 400
Publication date: Available online 29 November 2019Source: The Journal of Chemical ThermodynamicsAuthor(s): Mohammed Taghi Zafarani-Moattar, Hemayat Shekaari, Parisa JafariAbstractPresent study reports density (ρ), ultrasonic velocity (u), and viscosity (η) for some choline amino acid ionic liquids, [Ch][AA]-ILs, including choline glycine, choline L-valine and choline L-proline in aqueous solutions of two water soluble polymers, i.e. polypropylene glycol 400 (PPG400) and polyethylene glycol 400 (PEG400) with different mass fractions of polymer, w/w = (0.025, 0.050 and 0.075), at 298.15 K under atmospheric pressure ...
Source: The Journal of Chemical Thermodynamics - November 29, 2019 Category: Chemistry Source Type: research

Solid-Liquid stable phase equilibria of the quaternary system Na+ //Cl−, SO42-, CO32−-H2O and its subsystems Na+ //Cl−, CO32−-H2O and Na+ //SO42-, CO32−-H2O at 353.15 K
Publication date: Available online 26 November 2019Source: The Journal of Chemical ThermodynamicsAuthor(s): Shao-Ying Ge, Li Zhu, Yu-Long Ma, Er Liu, Kang-he ZhaoAbstractThe solid-liquid phase equilibria of the solution in the quaternary system Na+ //Cl−, SO42−, CO32--H2O and its subsystems Na+ //Cl−, CO32--H2O and Na+ //SO42−, CO32--H2O at 353.15 K were measured by isothermal solution saturation method. The equilibrium solids were determined by the Schreinemaker's method of wet residues and X-ray diffraction (XRD). Based on the experimental data, the phase diagrams were plotted and analysed. There ...
Source: The Journal of Chemical Thermodynamics - November 28, 2019 Category: Chemistry Source Type: research

Equilibrium solubility, solvent effect and preferential solvation of 5-nitrofurazone (form γ) in aqueous co-solvent mixtures of isopropanol, N-methyl pyrrolidone, ethanol and dimethyl sulfoxide
Publication date: Available online 26 November 2019Source: The Journal of Chemical ThermodynamicsAuthor(s): Yuxin Bao, Ali Farajtabar, Min Zheng, Hongkun ZhaoAbstractSolubilities of 5-nitrofurazone (form γ) in aqueous co-solvents mixtures of isopropanol, N-methyl pyrrolidone (NMP), ethanol and dimethyl sulfoxide (DMSO) were experimentally investigated via the saturation shake-flask technique at temperatures from 278.15 K to 323.15 K under ambient pressure of p=101.2 kPa. The solubility of 5-nitrofurazone increased to a maximum value with 100 % mass fractions of NMP and DMSO in aqueous solutions of NMP and DMSO, while...
Source: The Journal of Chemical Thermodynamics - November 28, 2019 Category: Chemistry Source Type: research

Separation of azeotrope 2,2,3,3-tetrafluoro-1-propanol and water: Liquid-liquid equilibrium measurements and interaction exploration
Publication date: Available online 25 November 2019Source: The Journal of Chemical ThermodynamicsAuthor(s): Liwen Zhao, Zhaojie Wang, Hui Yang, Dongmei Xu, Lianzheng Zhang, Jun Gao, Yinglong WangAbstractDue to the existence of azeotropic point for the mixture 2,2,3,3-tetrafluoro-1-propanol (TFP) and water, liquid-liquid extraction was adopted to separate TFP from its aqueous mixture with cyclohexanone as extractant in this work. The liquid-liquid phase behaviour for the mixture (TFP + water + cyclohexanone) was investigated at T = (293.15, 303.15 and 313.15) K and p = 101.3 kPa. Both selectivity and partition ratio were us...
Source: The Journal of Chemical Thermodynamics - November 26, 2019 Category: Chemistry Source Type: research

Editorial Board
Publication date: February 2020Source: The Journal of Chemical Thermodynamics, Volume 141Author(s): (Source: The Journal of Chemical Thermodynamics)
Source: The Journal of Chemical Thermodynamics - November 26, 2019 Category: Chemistry Source Type: research

Volumetric properties, viscosities and refractive indices of {3-diethylamino propylamine (DEAPA) + water} system from 293.15 K to 343.15 K
In this study, the physiochemical and transport properties of {3-(Diethylamino) propylamine (DEAPA) + water} system were investigated. The densities and refractive indices of aqueous DEAPA solutions were measured at a range of temperatures from 293.15 K to 343.15 K, and at a pressure p = 95.1 (±0.8) kPa. The viscosities of the aqueous DEAPA were also measured from T = 298.15 K to 333.15 K. The excess properties of aqueous DEAPA solutions were calculated based on the experimental results. In addition, the activation energies and entropies for viscous flow were estimated from the viscosity data. Th...
Source: The Journal of Chemical Thermodynamics - November 23, 2019 Category: Chemistry Source Type: research

5-Nitrosalicylaldehyde in aqueous co-solvent mixtures of methanol, ethanol, isopropanol and acetonitrile: Solubility determination, solvent effect and preferential solvation analysis
Publication date: Available online 22 November 2019Source: The Journal of Chemical ThermodynamicsAuthor(s): Xinbao Li, Yating He, Yuyuan Xu, Xiaotian Zhang, Min Zheng, Hongkun ZhaoAbstractThe equilibrium 5-nitrosalicylaldehyde solubility in methanol (1) + water (2), ethanol (1) + water (2), isopropanol (1) + water (2) and acetonitrile (1) + water (2) mixtures was determined by a shake-flask method from 273.15 K to 313.15 K under local pressure of 101.2 kPa. At the same mass fraction of methanol (ethanol, isopropanol or acetonitrile) and temperature, the mole fraction solubility of 5-nitrosalicylaldehyde was greater in (ace...
Source: The Journal of Chemical Thermodynamics - November 22, 2019 Category: Chemistry Source Type: research

Extended temperature regions of multiferroicity in nanoscale CuO
Publication date: Available online 19 November 2019Source: The Journal of Chemical ThermodynamicsAuthor(s): Jacob M. Schliesser, Rebecca E. Olsen, Brian F. WoodfieldAbstractWe have measured the magnetic susceptibility and heat capacity of CuO nanoparticles (16 nm) from 2 K to 400 K using a Quantum Design Physical Properties Measurement System (PPMS). The magnetization curves, acquired at various field strengths from 0 Oe to 50 kOe, are similar to literature data of bulk and nanoscale CuO showing a minimum at about 150 K, an upturn as temperature approaches 0 K, and a broad maximum at high temperatures extending beyond 400 ...
Source: The Journal of Chemical Thermodynamics - November 19, 2019 Category: Chemistry Source Type: research

Equilibrium solubility determination, solvent effect and preferential solvation of amoxicillin in aqueous co-solvent mixtures of N,N-dimethylformamide, isopropanol, N-methyl pyrrolidone and ethylene glycol
Publication date: Available online 15 November 2019Source: The Journal of Chemical ThermodynamicsAuthor(s): Wanxin Li, Ali Farajtabar, Rong Xing, Yiting Zhu, Hongkun ZhaoAbstractThe mole fraction solubility of amoxicillin in four co-solvent mixtures of N,N-dimethylformamide (DMF) + water (2), isopropanol (1) + water (2), N-methyl pyrrolidone (NMP) (1) + water (2) and ethylene glycol (EG, 1) + water (2) at temperatures from 278.15 K to 328.15 K was determined by means of the shake-flask technique. At the same temperature and composition of DMF, isopropanol, NMP or EG, the solubility magnitude of amoxicillin was highest in t...
Source: The Journal of Chemical Thermodynamics - November 17, 2019 Category: Chemistry Source Type: research