A.dF=SdT-pdVB.dF=SdT+pdVC.dF=-SdT+pdVD.dF=-SdT-pdV
A.(T,V)B.(S,V)C.(T,p)D.(S,p)
A.(?U/?V)T=0B.(?U/?p)T=0C.(?H/?V)T=0D.(?H/?p)T=0