1. For a certain binary system, the liquid phase obeys the van Laar activity coefficient model. For a vapour-liquid situation at a certain temperature, the system equilibrium pressure P is related to the liquid phase composition, xi, as follows: P= P +3(P P. ).x; -2(p* Py).x?; P, P. (saturation vapour pressure) are in bar. a) Determine if the system forms an azeotrope. b) If P1 = 2Pfind the relative volatility of the system when the liquid phase contains 40mole% of component '1