Using the Tds equations -cont. H=U+pV.----dH=du+d(pv)=du+pdv+vdp i du pdv dH-Vdp 1st Tds equation:Tds=dU pdv 2nd Tds equation: Tds dH-V dp 上游充通大学 Wednesday,April 12,2017 9 SHANGHAI JLAO TONG UNIVERSITYWednesday, April 12, 2017 9 Using the Tds equations – cont. 1 st Tds equation: 2 nd Tds equation: