Question $2$:

Mark $($

In the differential distillation column, a binary mixture of acetic acid and water is used, Where: The amount of the liquil the container at the end of the distillation process $=37\mathrm{.}79kg$; Initial acetic acid concentration$=60\%$; Final acetic acid concentration $=70\%$; The equilibrium relationship for the binary mixture of acetic acid and water is:

$yi=0\mathrm{.}4+0\mathrm{.}3$

The amount of the liquid in the container at the start of the distillation process is:

a$)120Kg$

b$)100Kg$

c$)100gm$

Question $3$:

Mark $(/9)$

A liquid mixture of benzene$-$toluene is to be distilled in a flash distillation tower at $101\mathrm{.}3$kPa pressure. The feed is liquid and it contains $45$mol$\%$ benzene and $55$mol$\%$ toluene and enters at or $($:$130F\}.$ A distillate containing $95$mol$\%$ benzene and $5$mol$\%$ toluene and a bottom containing $10$mol$\%$ benzene and $90$mol$\%$ toluene is to be obtained. The reflux ratio is $4$: $1.$ The average heat capacity of the feed is $159k\frac{J}{k}$gmol.$K(38BT\frac{U}{l}$bmol$F)$ and the average latent heat $32099k\frac{J}{k}$gmol $(13800BT\frac{U}{l}$bmol $).$ The $kg$ moles per hour distillate is $60$kgmo$\frac{l}{h}.$ The equilibrium data for this system is given in this Figure.

$24$

$($a$)0\mathrm{.}529$

b$)0\mathrm{.}729$

c$)0\mathrm{.}920$

The feed flow rate is:

a$)117\mathrm{.}2$kgmo$\frac{l}{h}r$

b$)127\mathrm{.}2$kgmo$\frac{l}{h}r$

c$)137\mathrm{.}2$kgmo$\frac{l}{h}r$

If the fraction of the feed liquid that is evaporated is equal to zero, and the flow rate is equal to $100$kgmo$\frac{l}{h}r.$ The $kg$ moles per hour distillate is:

a$)0$kgmo

b$)2$kgmo$\frac{l}{h}r$

c$)37\mathrm{.}5$kgmo$\frac{l}{h}r$