$$u$$d 'OOL ${(}^{}AA{I}^{}AA)$ Formula$/$Expressions:Q$\mathrm{.}1.$ Construct a Txy diagram for a mixture of benzene and toluene at $200$kPa. Benzene and toluene

may be considered as ideal solutions. The Boling point of benzene and toluene at STP is $80$ and $110C$

respectively.

In $P^{\text{s}\text{a}\text{t}}=A-\frac{B}{T+C},T$ is in Kelvin, $P$ is in kPa

Then draw the equilibrium curve for feed composition of $50$mol$\%$ of benzene. Find the minimum reflux

ratio and number of theoretical trays it the feed is at its boiling point. $95$mol$\%$ purity is needed in the

top product whereas only $4$mol$\%$ can be present in the bottom product.