A liquid mixture contains 25 mol% benzene and 75 mol% ethyl alcohol. The components are miscible in all proportions. The mixture is heated at a constant pressure of 1 atm from 60C to 90C. Using the following T-y-x experimental data, determine (a) the temperature where vaporization begins. (b) the composition of the first bubble of vapor. (c) the composition of the residual liquid when 25 mol % has evaporated, assuming that all vapor formed is retained in the apparatus and is in equilibrium with the residual liquid. (d) Repeat part (c) for 90 mol% vaporized. (e) Repeat part (d) if, after 25 mol% is vaporized as in part (c), the vapor formed is removed and an additional 35 mol% is vaporized by the same technique used in part (c). (f) Plot temperature versus mol% vaporized for parts (c) and (e). T-y-x DATA FOR BENZENE-ETHYL ALCOHOL AT 1 ATM Temperature, "C: 78.4 77.5 75 72.5 70 68.5 67.7 68.5 72.5 75 77.5 80.1 Mole percent benzene in vapor: 0 7.5 28 42 54 60 68 73 82 88 95 Mole percent benzene in liquid: 100 0 1.5 5 12 22 31 68 81 91 95 98 100 (g) Use the following vapor pressure data with Raoult's and Dalton's laws to construct a T-y-x diagram and compare it to the answers obtained in parts (a) and (f) with those obtained using the experimental T- y-x data. What are your conclusions? VAPOR PRESSURE DATA Vapor pressure, torr: 20 40 60 100 200 400 760 Ethanol, C: 8 19.0 26.0 34.9 48.4 63.5 78.4 Benzene, C: -2.6 7.6 15.4 26.1 42.2 60.6 80.1