Journal Articles (before-1995)

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    Vapour Pressure of H218O Ice (—50 to 0°C) and H218O Water (0 to 170°C)
    (Journal of the Chemical Society : Faraday Transaction - I. The Chemical Society, London. 1977, 73 (10), 1977) Jakli, Gyorgy; Staschewski, D.
    The vapour pressure difference between H216O and highly enriched H218O samples was measured directly with a capacitance type differential monometer between –50 and 80°C and with a U-type mercury manometer between 80 and 170°C. Data for the vapour pressure isotope effect in the ice range gave a good fit to the equation ln([graphic omitted])= 3.710/T+ 0.00132 (223 < T < 273), and those in the liquid range to ln ([graphic omitted])= 5.869/T– 0.0108 (293 < T < 443). From the temperature dependence of the vapour pressure ratios the isotope effects on the heat of sublimation and evaporation were calculated. At the melting point Δ(ΔHsub)= 31 J mol–1 while Δ(ΔHevap)= 77 J mol–1 were found. The results are compared with earlier measurements and with data for the HOH/DOD system, where the isotope effect on the heat of fusion is much larger and of opposite sign.
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    Pressure and Temperature Dependence of the Self-diffusion of Benzene
    (Journal of the Chemical Society : Faraday Transaction - I. The Chemical Society, London. 1972, 68 (8), 1972) McCool, M A; Collings, A F; Woolf, L A
    The self-diffusion coefficient of liquid benzene has been measured with a modified diaphragm cell. The cell incorporates a bellows in one compartment and the technique for its use makes allowance for bulk flow effects due to changes in pressure. Results have been obtained at 288, 298, 313 and 328 K over the pressure ranges 1-283, 1-645, 1-975 and 1-1496 bar, respectively and used to calculate activation energies and volumes. In contrast to earlier (less accurate) data the present results indicate a non-linear dependence of log D on pressure. The results are used to test a quasi-lattice model of the liquid. The Stokes-Einstein relation is obeyed over only a narrow density range.