Question $2$

A flash drum is used to separate a mixture of benzene and toluene. The drum is operated such that $70\%$ of the feed is vaporized. The feed of $400$kmo$\frac{l}{h}$ contains $45$ mole $\%$ benzene and $55$ mole$\%$ toluene. The vapour formed is in equilibrium with the residual liquid. Use the equilibrium data below.

$\backslash$table$[[x,0,0,13,0,258,0,411,0,581,0,78,1],[y,0,0,261,0,456,0,632,0,777,0,9,1]]$

$2\mathrm{.}1.$ Draw a schematic diagram to represent the process.

$2\mathrm{.}2.$ Complete the material balance over the drum to indicate the mole factions of all streams.

$[20$ Marks$]$