This is valid for which one of the following?

Question

The change in specific entropy of a system undergoing reversible process is given by                                 

S₂ – S₁ = (C_p – C_v) In (V₂/V₁)

This is valid for which one of the following?

a. Adiabatic process undergone by an ideal gas

b. Isothermal process undergone by an ideal gas

c. Polytropic process undergone by a real gas

d. Isobaric phase change from liquid to vapour