A mixture of 8.00 gram-moles of benzene and 2.00 gram-moles of toluene are placed in a closed cylinder equipped with a piston. The cylinder is immersed in a bath of boiling water that maintains the temperature at 100.0C. The force exerted on the piston can be varied to adjust the cylinder pressure to any desired values. The pressure is initially 1300 mm Hg and is gradually lowered to 600 mm Hg. Use the Pxy diagram below to convince yourself that the cylinder initially contains only liquid benzene and toluene and to answer the following questions. 115 110 105 Vapor 100 95 Temperature (C) Liquid 90 85 80 75 Pressure (mm Hg) 1400 1300 1200 1100 1000 900 800 700 600 500 0 Liquid Vapor 70 65 0 1.0 1.0 0.2 0.4 0.6 0.8 Mole fraction benzene P=1 atm (a) Txy diagram 0.2 0.4 0.6 0.8 Mole fraction benzene T = 100C (b) Pxy diagram At what pressure does the first vapor bubble form? i 700 mm Hg What is its composition? i 0.32 mol benzene/mol e Textbook and Media Hint Save for Later Attempts: 1 of 3 used Submit Answer Dew Point Pressure At what pressure does the last droplet of liquid evaporate? i mm Hg What is its composition? i mol benzene/mol Save for Later Attempts: 0 of 3 used Submit Answer Volume Estimate the volume of the cylinder contents when the pressure is 1300 mm Hg, 1150 mm of Hg, and 600 mm Hg. 1300 mm Hg: i L 1150mm of Hg: i i L 600 mm Hg: i L Save for Later Attempts: 0 of 3 used Submit