Vapor?liquid equilibrium data for mixtures of acetone (A) and ethanol at 1 atm are given in the following table:

(a) Use the given data to construct a Txy diagram for this system.

(b) A thermocouple inserted into a two-phase mixture of acetone and ethanol at equilibrium reads 62.1?C. The system pressure is 1 atm. Use the Txy diagram to estimate the mole fractions of acetone in the liquid and vapor phases.

(c) An Equimolar mixture of acetone and ethanol is fed to an evacuated vessel and allowed to come to equilibrium at 65?C and 1.00 atm absolute. Estimate (i) the molar compositions of each phase. (ii) The percentage of the total moles in the vessel that are in the vapor phase. and (iii) the percentage of the vessel volume occupied by the vapor phase.

(d) A liquid mixture containing 40.0 mole% acetone and 60.0 mole% ethanol is fed to a continuous flash evaporator. Vapor and product streams leave the unit in equilibrium at 1.00 atm. The molar flow rate of the vapor product stream is 20% of the molar flow rate of the feed stream. Estimate the operating temperature of the evaporator and the compositions of the liquid and vapor product streams

(e) Use Raoult?s law to estimate the bubble-point temperature and vapor composition in equilibrium with an Equimolar liquid mixture of acetone and ethanol. Calculate the percentage errors in the estimated values of Tb and y. Propose a reason why Raoult?s law produces poor estimates for this system. (Suggestion: Consider the molecular structure of the two components.)

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T(°C) 78.3 67.3 65.9 63.6 0.000 0.250 0.300 0.400 0.000 0.478 0.524 0.605 ХА УА 61.8 0.500 0.600 0.674 0.739 60.4 59.1 58.0 0.700 0.800 0.802 0.865 57.0 0.900 0.929 56.1 1.000 1.000