Journal Articles (before-1995)

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Subject: search.filters.subject.Thermodynamic Properties

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    Thermodynamic properties of organic oxygen compounds: Part 36.—Heat capacity of isopropyl ether
    (Journal of the Chemical Society : Faraday Transaction - I. The Chemical Society, London. 1974, 70 (10), 1974) Andon, Richard J. L.; Counsell, Jack F.; Lee, Derek A.
    Heat capacities of isopropyl ether (crystals, liquid and vapour) in the range 14 to 450 K and enthalpies of melting and vaporization have been measured. Heat capacities of the ideal gas, second virial coefficients of the vapour, and standard entropies of liquid and gas have been calculated from the measured properties.
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    Accurate Representation of Thermodynamic Properties near the Critical Point
    (Journal of the Chemical Society : Faraday Transaction - I. The Chemical Society, London. 1974, 70 (1-6), 1974) Chapela, Gustavo A.; Rowlinson, John S.
    The singularities in the thermodynamic functions of fluids at their critical points cannot be described by the analytic equations used for preparing tables of these functions. They can be described by scaling equations, but these are accurate only close to the critical point. It is shown that Schofield’s parametric version of the scaling equations can be combined with an analytic equation in such a way as to permit the accurate representation of the thermodynamic functions for all values of density and temperature. The method is demonstrated for carbon dioxide and methane.
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    Thermodynamic Properties of Fluorine Compounds: Part ll.1—Low-temperature Heat Capacities of the Three Tetrafluorobenzenes
    (Journal of the Chemical Society : Faraday Transaction - I. The Chemical Society, London. 1973, 69 (4), 1973) Andon, R. J. L.; Martin, J. F.
    The heat capacities of 1,2,3,4-, 1,2,3,5- and 1,2,4,5-tetrafluorobenzene were measured by adiabatic calorimetry at temperatures between 11 and 353 K. Enthalpies of phase transitions were also measured. The entropies of the liquids at 298.15 K were calculated from the measurements as 256.1, 257.3 and 250.4 3 K-1 mol-1 respectively. The heat capacity curve for 1,2,3,5-tetrafluoro- benzene showed that a transition occurred in the crystals just below the melting temperature. 1,2,3,4- tetrafluorobenzene crystallised first in a metastable form which, on cooling, rapidly transformed to stable crystals. No anomalies were found in the heat capacity curve of 1,2,4,5-tetrafluorobenzene.
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    Thermodynamic Properties of Hydrogen and Deuterium Dissolved in Palladium at Low Concentrations over a Wide Temperature Range
    (Journal of the Chemical Society : Faraday Transaction - I. The Chemical Society, London. 1973, 69 (2), 1973) Clewley, J. D.; Curran, T.; Flanagan, Ted B.; Oates, W. A.
    The equilibrium pressures of the Pd/H2 and Pd/D2 systems have been measured in the tempera ture range from — 100°C to 35O°C for values of H(D)-to-Pd, atomic ratio, in the approximate range from 0.0005 to 0.005. These data were obtained in an ultra-high vacuum apparatus with large samples of low surface area. Partial thermodynamic data have been obtained from these equilibrium data; a significant temperature dependence is reported for the relative partial molar enthalpies and entropies.
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    Effusion-Mass Spectrometric Study of Thermodynamic Properties of Vanadium and Vanadium Nitride
    (Journal of the Chemical Society : Faraday Transaction - I. The Chemical Society, London. 1973, 69 (2), 1973) Farber, Milton; Srivastava, R. D.
    Effusion-mass spectrometric studies were performed on the vapour species in equilibrium above VN(c) in the temperature range 1900 to 2412 K. From an analysis of the reactions involved, ΔHf298 values of 122.4 ± 5 kcal/mol (second law) and 120.4 ± 2 kcal/mol (third law) were obtained for VN(g), yielding a dissociation energy, D°298, for gaseous VN of 114.1 kcal/mol. An appearance potential of 8 ± 1 eV was recorded for VN(g). The thermodynamic analysis of the vapour species over the solid state yielded a second law ΔHf of –52 ± 1.5 kcal/mol for VN(c). Studies made in this temperature range resulted in a third law heat of fusion of 4.30 ± 0.45 kcal/mol for vanadium. The second and third law mass spectrometric ΔHf298 values of 122.8 ± 1.5 and 123.0 ± 0.2 kcal/mol, respectively, for V(g) were in good agreement with Knudsen third law weight loss experiments at 2092 and 2122 K, which yielded ΔHf298 values of 123.3 and 122.9 kcal/mol.