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Molecular Thermodynamics of Fluid-Phase Equilibria, Third Edition by Edmundo Gomes de Azevedo - Institute Superior Técnico, Lisbon, Rüdiger N. Lichtenthaler - University of Heidelberg, John M. Prausnitz - University of California, Berkeley

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Chapter 5 Fugacities in Gas Mixtures

It was shown in Chap. 2 that the basic equation ot equilibrium between two phases α and β, at the same temperature, is given by equality of fugacities for any component i in these phases:

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In many cases one of the phases is a gaseous mixture; in this chapter we discuss methods for calculating the fugacity of a component in such a mixture.

Formal thermodynamics for calculating fugacities from volumetric data was discussed in Chap. 3; the two key equations are:

(5-1)

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and

(5-2)

where the fugacity coefficient ...

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