11514

Effect of Temperature on Partial Miscibility in a Binary-Liquid System

This Demonstration shows how the mole fraction of a binary liquid system, composed of two partially miscible liquids, changes with temperature. Variation of the temperature will lead to changes in the Gibbs free energy, as shown in the graph. The global minimum point is labeled on the graph. A second, local minimum appears at lower temperatures. The colors of the two liquids in the beaker serve as an indicator of the mole fraction as the temperature changes.

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References
[1] S. R. Logan, “The Behavior of a Pair of Partially Miscible Liquids,” Journal of Chemical Education, 75(3), 1998 p. 339. doi:10.1021/ed075p339.
[2] J. P. Erikson, “Partially Miscible Water-Triethylamine Solutions and Their Temperature Dependence,” Journal of Chemical Education, 94(1), 2017 pp. 75–78. doi:10.1021/acs.jchemed.6b00489.
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