Examples: Thermodynamics Relations involving Entropy

The entropy of a substance can be expressed in terms of independent variable (T,P) or (T,v) and these relations are quite useful in estimating the entropy change when the system changes its state from to

(a) Entropy as a function of T and P

or

Maxwell relation and

or

(32.44)

(b) Entropy a as function of T and v

using

or

(32.45)