Chapter 18.7, Problem 18.10E

The thermodynamic equilibrium constant for the vaporization of water,

${\text{H}}_2\text{O(}l\text{)}\underset{}{\rightleftharpoons }{\text{H}}_2\text{O}(g)$

is $K_p=P_{{\text{H}}_2\text{O}}$. Use thermodynamic data to calculate the vapor pressure of water at 45°C. Compare your answer with the value given in Appendix B.