?Vapor/liquid-equilibrium azeotropy is impossible for binary systems rigorously

Chapter 13, Problem 13.31

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Vapor/liquid-equilibrium azeotropy is impossible for binary systems rigorously described by Raoult’s law. For real systems (those with \(\gamma_{i} \neq 1\)), azeotropy is inevitable at temperatures where the \(P_{i}^{\mathrm{sat}}\) are equal. Such a temperature is called a Bancroft point. Not all binary systems exhibit such a point. With Table B.2 of App. B as a resource, identify three binary systems with Bancroft points, and determine the T and P coordinates. Ground rule: A Bancroft point must lie in the temperature ranges of validity of  the Antoine equations.

Text Transcription:

gamma_i neq 1

P_i^sat