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JCE SymMath: Symbolic Mathematics in Chemistry
Theresa Julia Zielinski Monmouth University West Long Branch, NJ 07764-1898
Computing Liquid–Vapor Phase Diagrams for Non-Ideal Binary Mixtures by Franklin M. C. Chen, Department of Natural and Applied Science, University of Wisconsin–Green Bay, Green Bay, WI 54311;
[email protected] van Laar’s theory is used to calculate solvent and solute’s activity coefficients for non-ideal mixtures. The document concludes with construction of a binary phase boiling point diagram for a pair of liquids that form a non-ideal solution.
File Names: VapLiqEquilMC11.mcd and VapLiqEquilMC11.pdf Keywords: Upper Division Undergraduate; Physical Chemistry; Computer-Based Learning; Mathematics/Symbolic Mathematics; Phases/Phase Transitions/Diagrams; Thermodynamics Requires Mathcad 11 or higher.
This Mathcad worksheet is intended to help students learn about determining vapor–liquid phase diagrams for ideal and non-ideal binary mixtures. The document starts with a brief review of chemical potential, activities, and the two component phase rule. The first task for students is to construct a binary boiling point diagram for the benzenetoluene pair of liquids. Seventeen exercises guide the students as they learn the thermodynamics concepts of activity and activity coefficients as related to boiling point phase diagrams.
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Journal of Chemical Education
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The boiling point phase diagram for propanol-water system with –x– for the liquid and –䊏– for the vapor composition lines, respectively.
Vol. 82 No. 7 July 2005
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