Abstract

In Chapters 3, 4, and 5, we have discussed extensively the detailed thermodynamic aspects of the adsorption of solute and solvent at the interface formed by the contact of either liquid-gas or liquid-liquid phases. The surfaces in all these cases are regarded as homogeneous across the plane of contact, although perpendicular to the surface plane the surface phase is considered as inhomogeneous. Surface free energy (or interfacial tension) in such systems involving liquid interface can be accurately measured in the presence of solute component in the bulk solution so that excess adsorption at the interface can be calculated using the Gibbs adsorption equation.

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