Abstract
A thermodynamic treatment of solid/solution interfacial phenomena is presented with particular attention to formulas which are operational for the analysis of experimental data. The thermodynamic potential functions (enthalpy, free enthalpy and entropy) of immersion and displacement are divided into bulk and interfacial contributions. The enthalpies of immersion and displacement are obtained from calorimetry. From a knowledge of the adsorption excess isotherm, the free enthalpy of immersion (and displacement) can be deduced from the Gibbs adsorption equation. Hence the entropy of immersion and displacement can also be calculated. The bulk contribution is obtained from a combination of the adsorption excess isotherm with solution thermodynamic data. Subtraction of the bulk dilution quantities from the corresponding immersion (displacement) quantities gives access to the enthalpy, free enthalpy and entropy of formation of the adsorbed phase.
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