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Chapter 3. Energy Balances for Composite... > Energy Balance for Reacting Systems

3.6. Energy Balance for Reacting Systems

Chemical engineers must be proficient at including reacting systems into energy balances, and there are several key concepts that must be introduced. In reacting systems the number of moles is not conserved unless the number of moles of products is the same as the number of moles of reactants. Generally, the two best approaches for tracking species are to use an atom balance or to use the reaction coordinate. Here we will introduce the method of the reaction coordinate because it is much easier to incorporate into the energy balance. It is convenient to adopt the conventions of stoichiometry,

v1C1 + v2C2 + v3C3 + v4C4 = 0


  

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