Vapour Liquid Equilibrium Correlation and Prediction

Figure 1 Four types of binary P-x-y, T-x-y and x acetone # benzene. (B) System 1-butanol # acrylic acid.

y equilibrium phase diagrams. Correlation curves are for: (A) System (C) System cyclohexane #2-propanol. (D) System acetone # chloroform.

Consider an N-component closed system in which a liquid mixture at temperature T and pressure P is in equilibrium with a vapour mixture at the same temperature and pressure. The condition of thermodyn-amic equilibrium is that the chemical potentials of the components in both phases must satisfy the equality relation:

M<V = M<L (i = 1, 2, ..., N) (constant T) [1]

The introduction of the quantity called fugacity by G.N. Lewis has facilitated the application of this condition. The fugacity of a system, f, at constant temperature is defined in the following two equations:

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Solar Panel Basics

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