Fugacities of Mixtures: Summary



Key points from this module:
  1. Fugacity is an intensive variable, so it does not depend on the amount of the phase.
  2. When phases are in equilbrium, the fugacity of component 1 is the same in each phase, the fugacity of component 2 is the same in each phase, etc. .
  3. For an ideal gas mixture, the fugacity of each component is equal to its partial pressure.
  4. For an ideal liquid, the fugacity of each component is its mole fraction times its saturation pressure.

From studying this module, you should now be able to:
  1. Determine which component has a higher fugacity.
  2. Determine the fugacity of each component.
  3. Draw a fugacity versus temperature graph for a binary mixture. 
https://sites.google.com/a/learncheme.com/learncheme/student-resources/interactive-module-raoult-s-law-and-vapor-liquid-equilibrium/interactive-module-raoult-s-law-intro                                          Interactive Module Fugacity Single Component Intro                                       

Prepared by John L. Falconer and Kimberly R. Bourland

Department of Chemical and Biological Engineering, University of Colorado Boulder