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
A.dG=-SdT+VdP B.dG=+d(PV)-TdS C.dG=TdS+VdP D.dG=-SdT-PdV