5.- A liquid mixture containing 50 mol% n-heptane and 50 mol% n-octane, at 303K, was subjected to batch distillation at moderate pressure, stopping the process until 60% of the feed had been distilled. Calculate the composition of the distillate and residual liquid. The balance data is shown below...

10 0.317 0.361 0.5 0.55 0.409 0.46 0.5 0.516 0.577 -0.6 0.65 0.686 0.7 0.75