Question

PLEASE HELP!

Answer 1

Benzene be B

Toluene be T

We have made then one lettered to make things easier

• $\sf P^0_B=95.1mmHg,P^0_T=28.4mmHg$
• $\sf x_B=x_T=0.5$

$\\ \rm\Rrightarrow \dfrac{P^0_B-P_B}{P^0_B}=x_B$

$\\ \rm\Rrightarrow 95.1-P_B=95.(0.5)$

$\\ \rm\Rrightarrow 95.1-P_B=47.55$

$\\ \rm\Rrightarrow P_B=47.55mmHg$

And

$\\ \rm\Rrightarrow \dfrac{P^0_T-P_T}{P^0_T}=x_T$

$\\ \rm\Rrightarrow 28.4-P_T=28.4(0.5)$

$\\ \rm\Rrightarrow P_T=14.2mmHg$

Total vapour pressure

• 28.4+95.1
• 123.6mmHg