Macmillan Learning For the second method, use the Txy diagram for the ethanol-water system shown. Vapor-Liquid Equilibrium Mixture of Ethanol and Water 374 372- 370- 368- 366- 364- 36 362- T[K] 360- 358- 356- 354- 352- 350- Vapor composition Liquid composition Pure 0 0.1 0.2 0.3 0.4 0.5 0.6 P= 101.325 kPa 0.7 0.8 Mole fraction of ethanol [mol/mol] Azeotropic point 0.9 1.0 Pure ethanol

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