Proving the Equality of Gibbs Energies for Vapor-Liquid Equilibrium
Use the information in the steam tables of Appendix A.III to show that Eq. 7.1-9c is satisfied at 100°C and 0.101 35 MPa.
\left(\frac{\partial S}{\partial N^{\mathrm{I}}}\right)_{U^\mathrm{I}, V^{\mathrm{I}}}=0 \quad \text { so that } \quad \frac{\underline{G}^{\mathrm{I}}}{T^{\mathrm{I}}}=\frac{\underline{G}^{\mathrm{II}}}{T^{\mathrm{II}}} \quad \text { or } \quad \underline{G}^{\mathrm{I}}=\underline{G}^{\mathrm{II}} (7.1.9c)