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

This module uses screencasts and interactive simulations to explain how to do equilibrium calculations when one or more pure solid or pure liquid phases is involved in the equilibrium reaction. It then provides an example problem and a quiz screencast to allow the user to test themselves. We suggest 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 screencasts that describe heterogeneous chemical equilibrium and answer the questions within the screencasts.
  3. Use the interactive simulation to further understand the behavior of heterogeneous chemical equilibrium.
  4. Use the quiz interactive screencast to test your understanding.
  5. Try to solve the example problem before watching the solution in the screencast.
  6. Answer the ConcepTests.

Determining equilibrium conversion is important for determining condtions to carry out chemical reactions. For reactions involving more than one phase (heteroneneous reactions), equilibrium calcalations can determine if a reaction proceeds.  This module is intended for use in a thermodynamics course.

Before studying this module, you should:

After studying this module, you should be able to:
  1. Calculate equilibrium conversions for systems that contain more than one phase.
  2. Predict how pressure changes will affect equilibrium conversion for a heterogeneous reaction.
  3. Predict how the addition of a reactant or product to an equilibrium mixture will shift equilibrium for a heterogeneous reaction.