PROBLEM #2 (30 points) For the benzene (1)/toluene (2) mixture system, the vapor pressures are predicted from the fol- lowing Antoine equations: 2726.81 13.7819 t + 217.572 3056.96 In Psat 13.9320 t + 217.625 In Pusat where t is in C and vapor pressures are in kPa. A stream of this mixture is to be flashed in a chamber kept at 90C and 110 kPa pressure and the vapor and liquid are assumed to reach equilibrium under these conditions. It is assumed that Raoult's law is valid under the given conditions. b) (10 points) Determine the liquid and vapor compositions. c) (10 points) Determine the temperature of the mixture at a bubble-point pressure of 15 kPa and for which the composition is 15 mole percent benzene and 85 mole percent tolue X1 = 0.30 & X2 = = 0.70). (that is