Article,

Thermodynamic vapour pressure equation. triple and critical point applications. prediction of a linear logarithmic relation between surface tension and latent heat of evaporation

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Fluid Phase Equilibria, 66 (1-2): 113 - 124 (1991)
DOI: 10.1016/0378-3812(91)85050-5

Abstract

Kuz V.A., 1991. Thermodynamic vapour pressure equation. Triple and critical point applications. Prediction of a linear logarithmic relation between surface tension and latent heat of evaporation. Fluid Phase Equilibria, 66: 113-124.A vapour pressure equation was found, via a thermodynamic approach, for a liquid--vapour interface. The equation, when written appropriately, has the same temperature dependence on pressure as those that are widely used. An application for benzene near the triple point shows good agreement with an empirically found vapour pressure equation. Near the critical point, the present equation predicts results obtained previously by data fitting or suggested by scaling arguments. Recently, an empirical correlation for predicting interfacial tension has been developed on the basis of the existing linear logarithmic relationship between surface tension and latent heat of evaporation. We show that this empirically used linear logarithmic relation, subject to some conditions, results from the Clausius--Clapeyron equation and the present vapour pressure equation.

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