Consider a closed vessel initially containing 1 mol of pure ethyl acetate at 70°C and 86 kPa. Imagine that pure ethanol is slowly added at constant temperature and pressure until the vessel contains 1 mol ethyl acetate and 9 mol ethanol. Describe the evolution of phases and phase compositions during this process. Comment on the practical feasibility of carrying out such a process. What sort of device would be required? How would the total system volume change during this process? At what composition would the system volume reach its maximum value?

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Problems 12.3 through 12.8 refer to the Pxy diagram for ethanol(1)/ethyl acetate(2) at 70°C shown in Fig. 12.19. 94 92 90 88 86 84 Figure 12.19: Pry diagram for vapor/liquid equilibrium of ethanol(1)/ethyl acetate (2) at 70°C. 82 80 78 76 74 72 70 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 X1. y1 P (kPa)