| Abstract
| - In the present work, the corresponding states principle is proposed as a new approach to clarify the comparisonbetween adsorption−desorption isotherms obtained on porous solids. The applicability of this principle at thecapillary critical point in adsorption−desorption isotherms is demonstrated. Deviations of the Clausius−Clapeyron curves in reduced coordinates are interpreted in terms of polarizability, and those are perfectlycorrelated using analogous Pitzer acentric factors in confined environments. New acentric factors are proposedto take confinement effects in mesoporous materials into account. Enthalpic excesses during capillarycondensation could be predicted, and those are supported by calorimetric experiments.
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