NOTE
Concerning the Thermodynamic Consistency of the ''Surface Tension Components'' Equations tions in condensed phases. Consequently, in recent approaches apolar contributions are dominated by London interactions and polar contributions are
In this paper we show that the approach called surface tension dominated by an ''acid-base'' contribution. For instance, the van Osscomponents theory, developed to interpret contact angle phe-Good-Chaudury model defines the surface tension between two phases S nomena, has been established on an oversimplified thermodyand L as namic basis. It is recalled that it is possible to separate enthalpies into components, even in the surface case, but that it is not straightforward to apply these equations to the free enthalpies,
even at constant temperature and pressure. Some new results have been utilized to show that it is possible to use some approximations at ambient temperature, and therefore to use surface where g LW i is the Lifshitz-van der Waals component of the phase i surface tension, g / i is the acid component (acceptor effect) of the surface tension tension component theory in some cases with fruitful results.
of the phase i, and g 0 i is the basic component (donor effect) of the surface However, a new approach called surface enthalpy components tension of the phase i. All of these points have been recently reviewed by theory seems better, from both the theoretical and the experimen-Lee (2).
tal standpoints. ᭧ 1997 Academic Press
In Section 2, we will discuss the separation between enthalpy components