Mark $(/9)$

Question $1$: of $100$kgmo$\frac{l}{h}$ is liquid and it contains $58\mathrm{.}1$mol$\%$ benzene and $41\mathrm{.}9$mol$\%$ toluene and enters at $54C.$ A distillate containing $95$mol$\%$ benzene and $5$mol$\%$ toluene. The reflux ratio is $4$:$1.$ The average heat capacity of the feed is $140k\frac{l}{k}g$ mol. $K$ and the average latent heat $20000k\frac{J}{k}$gmol. the $kg$ moles per hour distillate is $60$kgmo$\frac{l}{h}.$ The slope of the $q-$line equation $8\mathrm{.}3.$ The equilibrium data for this system is given in this Figure. The bottoms containing $10$mol$\%$ benzene.