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 In Psat 13.7819 t + 217.572 3056.96 In Pat 13.9320 t + 217.625 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. a) (10 points) Determine the vapor pressures of the chemical species in the mixture