Vapor-Liquid Equilibrium Calculator for Chloroform/Acetone/Methanol Mixture

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Consider a ternary mixture of chloroform, acetone, and methanol at . The vapor-liquid equilibrium (VLE) behavior is described by a modified form of Raoult's law with activity coefficients predicted by the Wilson model [1].


This mixture presents four azeotropes, whose compositions and boiling points are:

This Demonstration displays the bubble point or the dew point temperature distributions in the form of density plots in the ternary diagram.

You can drag the locator to display the corresponding vapor and liquid compositions, as well as the bubble or dew temperatures.

Data shown in red is determined from the locator's position while data shown in blue is computed using VLE equilibrium rules.


Contributed by: Housam Binous and Brian G. Higgins (August 2011)
Open content licensed under CC BY-NC-SA




[1] G. M. Wilson, "Vapor-Liquid Equilibrium XI: A New Expression for the Excess Free Energy of Mixing," Journal of the American Chemical Society, 86(2), 1964 pp. 127–130.

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