The following temperature-composition data were obtained for a mixture of octane (0) and toluene (T) at 760 Torr, where x is the mole fraction in the liquid and ythe mole fraction in the vapour at equilibrium .θ/°C    110.9    112.0    114.0    115.8    117.3    119.0    120.0    123.0Xr         0.908    0.795     0.615    0.527   0.408     0.300    0.203    0.097YT         0.923    0.836     0.698   0.624    0.527     0.410    0.297    0.164The boiling points are 110.6 °C for toluene and 125.6 °C for octane. Plot the temperatur-composition diagram of the mixture . What is the composition of the vapour in equilibrium with the liquid of composition (a) XT = 0.250 and (b) xO = 0.250?

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Distillation

Distillation is a process/technique to separate more volatile components from less volatile components using the principle of relative volatility. In chemical engineering, distillation is one of the most common and important topics that is involved in almost every industry and process.