Problem \#1: A binary system of species 1 and 2 consists of vapor and liquid phases in equilibrium at temperature T. The overall mole fraction of species 1 in the system is z1=0.82. At temperature T, ln1=0.67Ax22ln2=0.67Ax12 And the values of saturated pressures are: P1sat=32.27kPa and P2sat=73.14kPa Assuming the validity of modified Raoult's law, answer the following questions: (a) Over what range of pressures can this system exist as two phases at the given T and z1 ? (b) For a liquid-phase mole fraction x1=0.9, what is the pressure P and what molar fraction of the system is vapor? (c) Show whether the system exhibits an azeotrope