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Vapor Liquid Equilibria: A Review

Maya B. Mane and S. N. Shinde

Vapor-liquid equilibrium data may be readily evaluated and extended when they are calculated as activity coefficients. The equations proposed by Van Laar, Margulas, Wilson, NRTL and UNIQUAC, which express the activity coefficients of the components of a mixture as functions of the liquid composition and empirical constants, are capable of fitting most of the available vapor liquid equilibrium data. Equations of state play an important role in chemical engineering design and they have assumed an expanding role in the study of the phase equilibria of fluids and fluid mixtures.