Case I Constant Specific Heat

For constant specific heat values. Equation 3.47 can be evaluated as 

2 Case II Temperature-Dependent Specific Heat Values 

For temperature-dependent specific heat functions, equations can be evaluated by simply substituting the functional relations and carrying out the integrations term by term. 

In order to simplify the computations, the integral equation (Equation 3.49) is written by computing enthalpy change from a reference temperature as 

The integral given by Equation 3.51 is evaluated for different gases over a range of temperature and assuming a reference temperature of Tq = 20°C or 298 K. Table C.7 presents such integral values for some of the conunon ideal gases. 

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