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.

$2\mathrm{.}1.$ 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$]$