The following temperature$/$composition data from Table Q$3\mathrm{.}1$ were obtained for a

mixture of two liquids A and B at $1\mathrm{.}00$atm, where $x$ is the mole fraction in the liquid

and $y$ the mole fraction in the vapour at equilibrium. The boiling points are $124C$ for

A and $155C$ for $B.$

Table Q$3\mathrm{.}1$: Temperature$/$composition data

$($a$)$ Develop the temperature$/$composition diagram for the mixture.

$(5$ Marks$)$

$($b$)$ Predict the composition of the vapour in equilibrium with the liquid of composition

and sketch a horizontal tie line corresponds to both liquid mixture:

$($i$)x_A=0\mathrm{.}60$

$($ii$)x_B=0\mathrm{.}22$

$(6$ Marks$)$