Chapter 11.12, Problem 18P

For a chloroform (1) + ethanol (2) system at 55°C, a Margules equation has been written as ${\underset{\_}{G}}^{\text{E}}/RT=(0.5579x_1+1.5254x_2)x_1{x}_2$ (Gmehling and Onken, 1977). Calculate the pressure and vapor-phase composition of the system when x₁ = .25. What would be the predicted pressure and vapor-phase composition if you treated the liquid as an ideal solution?