Showing papers in "The Journal of Chemical Thermodynamics in 1986"

TL;DR: In this article, the Tian-Calvet heat-flow calorimeter was used to measure the enthalpy of dissociation for clathrate hydrates of methane, ethane, and propane.

TL;DR: In this paper, a new apparatus has been specially developed for accurate measurements of the saturated-liquid and -vapour densities of pure fluids together with the vapour pressure along the whole coexistence curve (ranges covered: 50 to 350 K, 0.003 K and 0.02 K below the critical temperature).

TL;DR: In this paper, a calorimetric technique is described which gives for a single sample-loading the composition, enthalpy of dissociation, and heat capacities of gas hydrates.

TL;DR: In this article, Enthalpies of dissolution of nalkan-1-ols in H2O and in D2O have been determined calorimetrically at different temperatures.

TL;DR: In this paper, an ultrasonic apparatus for the measurement of the speed of sound in pure liquids is described, and the results of the measurement are compared with the literature values, and isentropic compressibilities ks are also calculated from the experimental results.

TL;DR: In this article, the design and construction of a modified isothermal flow calorimeter with a reproducibility of better than 0.5 per cent is described, which was used to measure H m E for (ethanol + water) at 298.15 K and pressures of 0.4, 5, 10, and 15 MPa.

TL;DR: In this paper, a Picker flow calorimeter is used to measure the heat capacity of a 1-alkanol, and a sharp peak appears in the partial molar heat capacity, reaching 540 J · K −1 · mol −1 at x n from 1 to 6.

TL;DR: In this paper, the enthalpies of dissolution in water of some monoesters, ethyleneglycol diesters, and glycerol triesters have been determined calorimetrically at different temperatures in the range 288 to 318 K.

TL;DR: In this paper, activity coefficients were obtained from vapour pressure measurements at 318.15 K over the whole composition range, at 283.15, 298.15 and 318. 15 K.

TL;DR: In this article, three-component phase diagrams, including tie-lines, have been determined at 2982 K for n-heptane + water in a mixture of methanol, ethanol, and propan-1-ol.

TL;DR: The simplest Wagner equation has itself been used from the date of its introduction in two forms, with different powers of the temperature variable, and it seems now that one of these is superior to the other and to be preferred as mentioned in this paper.

TL;DR: In this paper, the molar volumes, isobaric expansion coefficients, and isentropic compressibilities of solutions of a number of carbohydrates and their deuterated isomers were determined in H 2 O and D 2 O between 288.15 and 328.15 K and over a wide range of solute-to-solvent mole ratios.

TL;DR: In this paper, the authors report accurate measurements of H m E for (ethanol + water) at 323.15, 333.15 K and 0.4 MPa with their new high-temperature and high-pressure flow calorimeter.

TL;DR: In this article, the saturation densities and the isothermal compressibilities near to the phase boundary were determined in the homogeneous part of the critical region of methane in the density range from 60 to 260 kg·m−3 with about 30 values on each of the isotherms.

TL;DR: In this paper, the authors measured the heat capacity of Ag2S from 5 to 1000 K by adiabatic-shield calorimetry from 5.5 to 5.3 K, depending upon previous history of the sample.

TL;DR: In this article, the ion-interaction model was fitted, by a least-squares computation, to the experimental results, and a value of 1.4 for the fixed parameter α gave a better overall fit than the normally used 2.0.

TL;DR: In this article, the excess molar Gibbs free energies (GmE) were calculated at the same three temperatures from both the (solid + liquid) and (vapor+ liquid) measurements and the results compared.

TL;DR: In this article, the results of a least-squares treatment of the equilibrium results were obtained for tetrachloromethane + methanol, + ethanol, + 1-propanol,+ 1-butanol, + 2-methyl-2propanols, + tetrahydrofuran, and + 1,4-dioxane.

TL;DR: The molar enthalpies of solution extrapolated to infinite dilution are for anhydrous oxalic acid, Δ sol H m ∞ (298.15 K, m = 0.0200 mol · kg −1 ) = (18211 ± 69) J · mol −1, and for citric acid monohydrate, ǫ 0.

TL;DR: In this article, the standard Gibbs free energy and enthalpy of formation as well as the standard entropy were determined for sodium zirconate by means of an electrochemical-formation cell in the temperature range 600 to 1100 K.

TL;DR: In this paper, the thermodynamic stabilities of TeO2(s) and Sb2Te3 (s) were determined by the solid-electrolyte technique using the following galvanic cells in the temperature ranges 588 to 722 K and 726 to 898 K.

TL;DR: In this paper, the orthobaric liquid densities of six halogenated hydrocarbons: trichlorofluoromethane (CCl 3 F), dichlorodifluormethane(CCl 2 F 2 ), chlorodiflooromethanes (CHClF 2 ), 1,1,2-trichlorotrifluoroethane (cCl 2 FCClF2 ), 1.2-dichloroethylene (DDE), 1.4-dichelorotetraflu

TL;DR: In this article, a high-precision vibrating-tube densimeter was used to measure the excess molar volumes VmE at 298.15 K for tetrachloromethane + methanol, + ethanol, + 1-propanol,+ 1-butanol, + 2-methyl-2propanols, + tetrahydrofuran, and + 1,4-dioxane.

TL;DR: In this paper, the specific enthalpy increment of ethanol was measured with 139 measurements at pressures from 0.1 to 10.05 MPa. The overall accuracy is 0.5 per cent.

TL;DR: In this paper, a flow mixing calorimeter was used to make measurements of the excess molar enthalpy of (water + carbon monoxide) and (water+ carbon dioxide) at temperatures up to 698.2 K and pressures up to 13.4 MPa.

TL;DR: In this article, the authors compared the thermodynamic properties of binary mixtures containing methyl methylthiomethyl sulfoxide (mmtso), CH 3 (CH 3 SCH 2 )SO, and those containing dimethyl sulfoxide( dmso), using bicapillary pyknometers.

TL;DR: In this paper, a recirculating still was used in the determination of isothermal vapour-liquid equilibria for eight examples of (an aliphatic ether + an alkane) and three of (aliphatic acid + benzene) at a total of 14 isothermal conditions.