Water + hexane and water + benzene are immiscible pairs.

(a) The binary system water + benzene boils at 69.4 °C and 760 mmHg. What is the activity coefficient of benzene in water if the solubility at this point is x_B = 1.6E-4, using only this information and the Antoine coefficients?

(b) What is the vapor composition at the bubble pressure at room temperature (292 K) for a ternary mixture consisting of 1 mole overall of each component if the organic layer is assumed to be an ideal solution?

(c) What is the vapor composition at the bubble pressure at room temperature (292 K) for a ternary mixture consisting of 1 mole overall of each component if the activity coefficients of the organic layer are predicted by UNIFAC?

The following problems concern LLE in ternary systems. Experimental data for the systems are listed in Tables 14.3 and 14.4.

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Table 14.3 Water (1) + Methylethylketone(MEK) (2) + Acetic Acid(3) System at T = 299.85 Kª a phase mol% ß phase mol% 2 2 92.689 91.644 90.839 90.681 1 7.311 8.049 8.623 8.733 0. 0.307 0.538 0.586 3 36.383 38.601 40.531 41.835 1 63.617 60.547 57.986 56.287 0. 0.851 1.482 1.878 3