Browsing by Author "Moss, Rodney H."

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Modified entrainment method for measuring vapour pressures and heterogeneous equilibrium constants: Part 1.—Theory, and validation of the method using water and lead
(Journal of the Chemical Society : Faraday Transaction - I. The Chemical Society, London. 1974, 70 (12), 1974) Battat, David; Faktor, Marc M.; Garrett, Ian; Moss, Rodney H.
A method of evaluating vapour pressures and equilibrium constants for heterogeneous reactions is proposed. It replaces the usually indeterminate contribution of gaseous transport in the conventional entrainment method by a calculable amount. The method was successfully applied at around room temperature to the evaporation of water, and to the vaporisation of lead in the temperature range 900–1050°C.
Modified entrainment method for measuring vapour pressures and heterogeneous equilibrium constants: Part 2.—Equilibria in the water/gallium system
(Journal of the Chemical Society : Faraday Transaction - I. The Chemical Society, London. 1974, 70 (12), 1974) Battat, David; Faktor, Marc M.; Garrett, Ian; Moss, Rodney H.
The modified entrainment method is applied to the study of a heterogeneous equilibrium: water vapour/liquid gallium, in the temperature range 1200–1400 K. Two gaseous gallium species, Ga2O and GaOH, were observed. The theory of the modified entrainment method is extended to this more complex case involving two simultaneous reactions. The entropies and enthalpies of formation are: [graphic omitted]
Modified entrainment method for measuring vapour pressures and heterogeneous equilibrium constants: Part 3.—Measurement of diffusivity of hydrogen chloride in hydrogen and extension of the method to multicomponent diffusion at 700–1300 K
(Journal of the Chemical Society : Faraday Transaction - I. The Chemical Society, London. 1974, 70 (12), 1974) Battat, David; Faktor, Marc M.; Garrett, Ian; Moss, Rodney H.
The binary diffusion coefficient of HCl in H2 may be represented by 0.54(T/273 K)1.85 cm2 S–1 over the temperature range 700–1300 K. We present a useful second-order approximation to multicomponent diffusion, which permits calculation of effective diffusion coefficients in multicomponent gas mixtures.
Modified entrainment method for measuring vapour pressures and heterogeneous equilibrium constants: Part 4.—The gallium arsenide/hydrogen chloride system
(Journal of the Chemical Society : Faraday Transaction - I. The Chemical Society, London. 1974, 70 (12), 1974) Battat, David; Faktor, Marc M.; Garrett, Ian; Moss, Rodney H.
The modified entrainment method described earlier has been used to study the GaAs/HCl system. Above about 900 K, the principal gallium vapour species is the monochloride, for which ΔH°f298=–63.2 ± 3 kJ mol–1 and S°298= 247 ± 2 J mol–1K–1. Below this temperature, another gallium species thought to be GaCl2 becomes important.