Vapor-Liquid Equilibrium of a Pure Substance

Gas Phase
Liquid Phase
Measures Total Pressure,
Ptotal
Measures Vapor Phase Mole Fraction, yi = 1
Pure component vapor-liquid equilibrium illustrated by a tank with a guage that reads total pressure and a gauge that indicates that the mole fraction of species i is one.
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Ch 2, Lesson D, Page 1 - Vapor-Liquid Equilibrium of a Pure Substance