1. The problem statement, all variables and given/known data Express (dA/dV)p in terms of P,V,T,Cp,Cv and their derivatives. Your answer may include absolute values of S if it is not a derivative constraint or within a derivitive 2. Relevant equations Maxwell's equations Product Rule Chain&Expansion rule 3. The attempt at a solution Using the maxwell's relations (dA/dV)p= -S(dT/dV)p -P(dV/dV)p = -S(dT/dV)p -P This is where I am stuck. Because S is a coefficient of the derivative can you turn (dT/dV)p to P/R where T=VP/R. S is calculated from measurable properties so I believe this doesn't work If this works than (dA/dV)p simply equals -SP/R -P. I believe you need to get rid of S but I don't know how at this point.