Interactive Self-Study Module: Fugacities of Mixtures
Department of Chemical and Biological Engineering, University of Colorado Boulder 

This module uses screencasts and interactive simulations to explain the driving force for mass transfer in a mixture. Example problems are provided to allow the user to test themselves. We suggest reviewing the single-component fugacity module before using the learning resources in the following order: 

  1. Attempt to answer the multiple choice ConcepTests before watching the screencasts or working with the simulations.
  2. Watch the screencast that describes fugacities in mixtures and answer the questions within the screencast.
  3. Use the two interactive simulations to further understand the driving force for phase equilibrium in mixtures.
  4. Try to solve the two example problems before watching the solutions in the screencasts.
  5. Answer the ConcepTests.

Fugacity is used to determine the direction of mass transfer between phases and to determine when phases are in equilibrium. 

This module is intended for a Thermodynamics course.

Before studying this module, you should:

After studying this module, you should be able to:
  1. Calculate fugacities of each component in an ideal gas mixture.
  2. Calculate liquid phase fugacities of each component in an ideal solution.
  3. Explain criteria that are used to determine phase equilibrium for multicomponent mixtures.
  4. Sketch fugacity versus temperature for each component in an ideal binary mixture.