Find the bubble-point and dew-point temperatures of a mixture of 0.4 mole fraction toluene (1) and 0.6 mole fraction n-butanol (2) at 101.3kPa. The K-values can be calculated from (2-72), the modified...

Find the bubble-point and dew-point temperatures of a mixture of 0.4 mole fraction toluene (1) and 0.6 mole fraction n-butanol (2) at 101.3kPa. The K-values can be calculated from (2-72), the modified Raoult's law, using vapor-pressure data, and ?l and ?z from the van Laar equation of Table 2.9 withAI2 = 0.855 and A2l = 1.306. If the same mixture is flashed at a temperature midway between the bubble point and dew point, and 101.3kPa, what fraction is vaporized, and what are the compositions of the two phases?