- (15 POINTS) BUBBLE POINT PRESSURE CALCULATION: A liquid mixture of ace- tone(1)/methanol(2) system is at equilibrium with a vapor from which it is formed. At 55C the vapor pressures are determined to be psat = 97.2497 kPa, Pat 68.3364 kPa. Furthermore, at 55C the activity coefficients of the species are 71 exp(0.64xz) and 72 = exp(0.64.x). Given that the composition of the liquid phase is 35 mole percent acetone and the rest methanol, determine the: (i) bubble point pressure of the system at equilibrium and; (ii) composition of the vapor in equilibrium with the liquid. Solution