As shown in Figure, water (W) and n-butanol (B) can form a three-phase system at 101 kPa. For a mixture of overall composition of 60 mol% W and 40 mol% B, use a simulation computer program and the UNIFAC method to estimate:(a) Dew-point temperature and composition of the first drop of liquid.(b) Bubble-point temperature and composition of the first bubble of vapor.(c) Compositions and relative amounts of all three phases for 50 mol%vaporization,

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1200 160 1100 146 Total pressure 1000 133 1.0 0.9 900 119 0.8- Partial press. Phase A le 106 800 of water p. Equilibrium ling 93 I Phase A. 80 0.7 700 Phase A 0.6 600 Phase A Phase B Phase B65 0.5- 500 1 Phase B 53 Phase B 400 0.4 Partial pressure 40 0.3 300 of butanol p2 200 0.2 13 0.1 100 06 0.6 0.8 1.0 1.0 0.2 0.4 0.2 0.4 0.8 Mole fraction water in liquid phase, 1 Mole fraction water in liquid phase, 11 (b) (al 130 Vapor 120 Dew point line Vapor 110 * phase B Vapor + phase A Bubble noint line 100 90 Phase A- Phase B Fhase 9 Phase A B0 0.6 0.8 1.0 0.2 0.4 Mole fraction water Pressure, tor Temperature, C Pressure, kPa Mole fraction water in vapor phaSA, y