Example $1.$ Flash separator for ethanol and water

A flash distillation chamber operating at $101\mathrm{.}3$kPa is separating an ethanolwater mixture. The feed mixture is $40$mol$\%$ ethanol and $F=100$kmo$\frac{l}{h}.$

$($a$)$ What is the maximum vapor composition and

$($b$)$ What is the minimum liquid composition that can be obtained if V$/$F is allowed to vary?

c$)$ If $\frac{V}{F}=\frac{2}{3},$ what are the liquid and vapor compositions?

d$)$ Repeat step $c,$ given that $F$ is specified as $1000$kmo$\frac{l}{h}.$

Solution

$25$

Liquid product $(x)$