Abstract
In Section 1.12, it was pointed out that the molecules at the boundary region of a solid in contact with a liquid possess higher energy than those present in the interior bulk regions of the condensed phases. It is a common experience that a powdered solid material is able to adsorb many gases with which the former is kept in contact at high pressure. At the interface of the solid powder, the gas molecules accumulate in excess whereby the interfacial energy is decreased. The extent of such accumulation (or adsorption) is experimentally measurable and it is found to depend on temperature, pressure, and other experimental conditions.1 The amount of such adsorption of a gas by a solid material may be positive or zero but never negative.
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© 1984 Plenum Press, New York
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Chattoraj, D.K., Birdi, K.S. (1984). Adsorption at Liquid Interfaces and the Gibbs Equation. In: Adsorption and the Gibbs Surface Excess. Springer, Boston, MA. https://doi.org/10.1007/978-1-4615-8333-2_3
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DOI: https://doi.org/10.1007/978-1-4615-8333-2_3
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