Material Balance Review

Upon studying this section, you should be familiar with the following:

A Material Balance Intro

There are few interrelations or unit conversions in this section that are covered explicitly. For the most part, mastering the skills required to solve these types of problems involves repetition; solving many problems until you become comfortable moving from one concept to another smoothly. Some points to keep in mind are listed below:

  • How to draw a flow chart when you are given a problem statement
  • How to draw boundaries around systems for multi-unit processes
  • How to set up a table to solve problems, and how to write equations for each boundary
  • For reactions, how to write extents of reactions for each component that goes into or leaves the reactor
  • For a reaction (or several reactions), be comfortable with the following definitions (interrelationships): limiting reagents, fractional or percent excess, fractional or percent conversion, selectivity, and yield
  • And of course, we need to be ready to choose a basis if we are asked for an answer that is a ratio.
  • And lastly, be comfortable with scaling your answers

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