$10-28.$ Use the expressions for $P_1$ and $P_2$ given in Problem $10-26$ to construct a pressurecomposition diagram.

$10-26.$ Suppose the vapor pressures of the two components of a binary solution are given by

$P_1=x_1{P}_1^{**}{e}^{\frac{x_2^2}{2}}$

and

$P_2=x_2{P}_2^{**}{e}^{\frac{x_1^2}{2}}$