A sharp separation of benzene $(B)$ and cyclohexane $(CH)$ by distillation is impossible because of

an azeotrope at $77\mathrm{.}6C,$ as shown by the data of K$.$C$.$ Chao $[$PhD thesis, University of Wisconsin

$(1956)].$ At $1$ atm:

$($a$)$ Use the data to calculate and plot the relative volatility of benzene with respect to

cyclohexane versus benzene composition in the liquid phase. What happens in the vicinity of the

azeotrope?

$($b$)$ Estimate the composition of the azeotrope. Is it a maximum boiling or minimum$-$boiling

azeotrope?

$($c$)$ Using a process simulator with the Wilson equation to compute and plot the activity

coefficients. How well do they compare with the experimental data?