Phase Equilibria
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 JCE
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 JCE
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.