Open AccessStudies of gas-solid equilibria. Part IV.—Pressure-concentration equilibria between ferric oxide gels and (a) water, (b) ethyl alcohol, (c) benzene, directly determined under isothermal conditions
Author(s) -
Bertram Lambert,
A. Graham Foster
Publication year - 1932
Publication title -
proceedings of the royal society of london. series a, containing papers of a mathematical and physical character
Language(s) - English
Resource type - Journals
eISSN - 2053-9150
pISSN - 0950-1207
DOI - 10.1098/rspa.1932.0087
Subject(s) - chemistry , isothermal process , ferric , alcohol , oxide , saturation (graph theory) , mercury (programming language) , vapour pressure of water , benzene , water vapor , chromatography , inorganic chemistry , thermodynamics , organic chemistry , physics , mathematics , combinatorics , computer science , programming language
In this part of the work attempts have been made to determine the pressure concentration equilibria between ferric oxide gel and water, making use of exactly the same procedure as that employed in Parts II and III, and using ferric oxide gel from the same batch as that employed in Parts I and II. A serious difficulty was encountered owing to the liberation of a small quantity of gas from the activated and evacuated gel when the concentration of water in the system was brought near to saturation. The presence of a gas (as distinct from water vapour) in the system made itself evident—usually quite suddenly—by a very marked slowing-down of the rate at which water vapour could be transferred by evaporation from the water reservoir to the gel system. The pressure of this gas could, after some time, be estimated by the height to which mercury rose into the “cut-off” from the mercury reservoir. The largest pressure recorded in this way showed the presence of approximately 4 c. c. (at N. T. P.) of gas in the system.