Macroscopic Energy Balance for Batch Reactors

For a batch reactor, there is no flow across the system boundaries and no transport of enthalpy across the system boundaries. From Eqn. (8-1), 

The total internal energy of the system, i.e., the reactor contents, is related to the total enthalpy of the system, fgyg, by 

If the change in pressure is small, the enthalpy will depend only on temperature so that 

Energy balance— batch reactor— multiple reactions 

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