Determination of Change in Enthalpy for Nonreacting Species and Mixtures

3 DETERMINATION OF CHANGE IN ENTHALPY FOR NONREACTING SPECIES AND MIXTURES 

Eor a nonreacting species with no phase change, the heat of formation and LH terms cancel out, and what is left is the change in sensible enthalpy. So, for a nonreacting gas we can show that 

Eor an enthalpy change between two temperature states of a nonreacting species, the reference temperature enthalpy terms cancel out. This will not be the case for reacting mixtures but simplifies things here. There are several ways to solve Eq. (3.36) for the 

For many species there are tables available to look up the enthalpy values. 

We can assume constant specific heats at an appropriate average temperature and 

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Determination of Change in Enthalpy for Nonreacting Species and Mixtures 79 sensible enthalpy change ... 

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