Apply the ESD equation to the methanol + benzene system and compare to the data in Perry’s Handbook based on matching the bubble pressure at the azeotropic point. Prepare a T-x-y diagram and determine whether the ESD equation indicates a liquid-liquid phase split for any temperatures above 250 K. Perform the same analysis for the Peng-Robinson EOS. Do you see any differences? Compare to Fig. 15.3.

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355 350 345 340 T X 335 330 325 X 0 X Ki -0.084 0.2 A 0.4 D 0.6 k₁=0 0.8 x,y methanol Figure 15.3 T-x-y diagram for the azeotropic system methanol + benzene. Curves show the predictions of the Peng-Robinson equation (k = 0) and correlation (k.j = 0.084) based on fitting a single data point at the azeotrope; x's and triangles represent liquid and vapor phases, respectively. 1