Liquid–vapor equilibrium data have been collected for a binary system of benzene (1)–cyclohexane (2) at 60°C. Mole fraction of liquid and vapor vs. total pressure are reported in the table below.

From these data, determine the value of the two-suffi x Margules parameter, A. Compare your result to that obtained in Example 7.13. What value do you think is more accurate?

Example 7.13

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X1 0 0.0672 0.2261 0.3201 0.432 0.5203 0.6029 0.7095 0.7952 0.8752 0.8932 1 Y 0 0.0912 0.267 0.3526 0.448 0.5203 0.5895 0.677 0.7563 0.8386 0.86 1 P [Pa] 51,857 53,431 55,939 56,741 57,527 57,633 57,432 56,989 56,095 54,934 54,629 52,190