A.G=U-PV+TS B.G=H-TS C.G=H+TS D.G=F-PV
A.F=U+TS B.F=G-PV C.F=G+PV D.F=G-TS
A.G=U+PV B.H=G+TS C.H=G-TS D.H=U-TS