The compositions of coexisting phases of ethanol(1) + toluene(2) at 55C are x 1 = 0.7186, and

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The compositions of coexisting phases of ethanol(1) + toluene(2) at 55°C are x1 = 0.7186, and y1 = 0.7431 at P = 307.81 mmHg, as reported by Kretschmer and Wiebe, 1949. J. Amer. Chem. Soc., 71:1793. Estimate the bubble pressure at 55°C and x1 = 0.1, using

(a) The Scatchard-Hildebrand model with k12 = 0

(b) The SSCED model with a default value of k12

(c) The SSCED model with k12 matched to the data

(d) The van Laar equation

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