Phase Equilibria |
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Computing a Liquid-Vapor Phase Diagram
Sidney H. Young, University of South Alabama |
A Mathcad worksheet focused on determining vapor-liquid phase diagrams for ideal and non-ideal binary mixtures for learning about activity and activity coeeficients. | |

Computing Liquid-Vapor Phase Diagrams for Non-ideal Binary Mixtures
Franklin M.C. Chen, University of Wisconsin-Green Bay |
A Mathcad worksheet focused on determining vapor-liquid phase diagrams for ideal and non-ideal binary mixtures for learning about activity and activity coeeficients. Van Laar theory and the Leavenberg-Marquardt algorithm are used. | |

Effect of Activity Coefficients on Excess Functions and Phase Equilbria
Baudilio Coto, ESCET, Rey Juan Carlos University Immaculada Suárez, ESCET, Rey Juan Carlos University |
In this document students use Maple to explore the relationship between activity coefficients, excess functions, and phase equilibria. start from the activity coefficient as a known property. In this study students examine how some functions change due to activities resulting in excess functions that differ from zero and vapor-liquid diagrams show complex behavior. The model avoids complex iterative procedures. In the end the vapor-liquid equilibrium equations are solved to compute both the isobaric and isothermal binary diagrams. The results are plotted and avialable for student interpretation. Additional exercises are presents for student practice. |