Fugacities Part 28


S as function of V and T. For simplicity, we consider first a pure phase component i. Integration of (91) yields


(107)

Expansion in an ideal gas and a deviation term:


(108)

Solving the last integral in (108):


(109)

Extending the lower integration limit:


(110)

The first two terms of (110) are the S of an pure hypothetical ideal gas. If the system is a mixture ideal mixing entropy has to be added


(111)