(∂S∂T)P(∂T∂P)S(∂P∂S)T=−1. Also, we have a Maxwell relation (Equa...\boldsymbol{\left(\frac{\partial S}{\partial T}\right)_{P}\left(\frac{\partial T}{\partial P}\right)_{S}\left(\frac{\partial P}{\partial S}\right)_{T}=-1. \label{15.2.1}} Also, we have a Maxwell relation (Equation 12.6.16). (∂S∂P)T=−(∂V∂T)P. (∂T∂P)S=TCP(∂V∂T)P.