dF=d (U-TS) =dU-TdS-SdT Tas -Pdy-oW-TaS-SdT dF-SdT-PdV-OW dG=d (H-TS)=dH-Tds-SdT TdS +VdP-OW-TdS-SdT dG-SdT-VdP-oW 3 3 dF=d（U-TS） =dU-TdS-SdT = TdS -PdV- W`-TdS-SdT dF=-SdT-PdV- W` dG=d（H-TS）=dH-TdS-SdT = TdS +VdP -  W`-TdS-SdT dG=-SdT+VdP - W` / / / /