A model for the free energy of adsorption on low energy surfaces. |
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Authors: | J.W. Whalen |
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Affiliation: | Department of Chemistry, The University of Texas at El Paso El Paso, Texas 79968 USA |
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Abstract: | In constructing a generalized thermodynamics for the fluid-vapor-solid equilibrium in poorly wetted systems the specific free energy of adsorption at saturation vapor pressure is a basic and elusive term. If the adsorbed phase is modeled as a two dimensional gas, systems for which a complete spectrum of data is available can serve as an empirical basis for constructing and testing adsorption-contact angle relationships. From the extension of such relationship other often inassessible terms can be estimated. Such a construct is reported here and extended to the estimation of the excess adsorption entropy at saturation vapor pressure in non-wetting systems |
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