Special case Apply the Tds equation to a change in phase from sat.liq.sat.vap.const.T and p. T T ds dh -vdp 0 dh he -h ds → SgSf= T Si Const. 上游充通大学 Wednesday,April 12,2017 11 SHANGHAI JLAO TONG UNIVERSITYWednesday, April 12, 2017 11 Special case Apply the Tds equation to a change in phase from sat. liq.  sat. vap. @ const. T and p. T s s f sg 0 Const