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

This module uses screencasts and interactive simulations to explain steady-state mass balances around various process units. It then provides example problems and a step-by-step quiz simulation 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 the general mass balance equation and answer the questions within the screencasts.
  3. Use the two interactive simulations to further understand how recycle streams can improve overall yields.
  4. Use the quiz interactive simulation to test your understanding by carrying out mass balances.
  5. Try to solve the two example problems before watching the solutions in the screencasts.
  6. Answer the ConcepTests.

Mass balances are used to help solve complex problems around various process units.

This module is intended for a material and energy balance course.

Before studying this module, you should:

  • Be familiar with general chemistry. 
  • Know how to calculate mass fractions and mole fractions.

After studying this module, you should be able to:
            Perform steady-state mass balances around various process equipment.