The vapor and liquid phases of a binary system of methanol (1) and acetone (2) are in equilibrium at 330 K. Assume that the vapor phase is ideal and the liquid phase is represented by the three-suffix Margules model with the following parameters: A = 0.538 and B = 0.028

(a) Estimate the pressure and the composition of the vapor phase when x1 = 0.525.

(b) Estimate the overall mole fraction range over which this system exists with a liquid mole fraction of x1 = 0.525.