The vapour pressure of pure benzene and methy | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(C) Given that the mixture is equimolar,the mole fraction of benzene $(X_B)$ and methyl benzene $(X_M)$ in the liquid phase are both $0.5$.The partial

Vedclass · Accepted Answer

$23$

Vedclass · Answer

(C) Given that the mixture is equimolar,the mole fraction of benzene $(X_B)$ and methyl benzene $(X_M)$ in the liquid phase are both $0.5$.The partial vapour pressure of methyl benzene is $P_M = X_M 	imes P^{\circ}_M = 0.5 	imes 24 \ Torr = 12 \ Torr$.The partial vapour pressure of benzene is $P_B = X_B 	imes P^{\circ}_B = 0.5 	imes 80 \ Torr = 40 \ Torr$.The total vapour pressure is $P_{	ext{total}} = P_M + P_B = 12 \ Torr + 40 \ Torr = 52 \ Torr$.The mole fraction of methyl benzene in the vapour phase $(Y_M)$ is given by $Y_M = \frac{P_M}{P_{	ext{total}}}$.$Y_M = \frac{12}{52} \approx 0.2307$.Rounding to the nearest integer as requested,$Y_M \approx 23 	imes 10^{-2}$.

Similar Questions

$p_A$ and $p_B$ are the vapour pressures of pure liquid components $A$ and $B$ respectively of an ideal binary solution. If $x_A$ represents the mole fraction of component $A,$ the total pressure of the solution will be

Derive an equation for a solution that shows the relation between total pressure and the mole fraction of a volatile solute and a volatile solvent,and explain it by plotting a graph.

Which of the following solutions in water will have the lowest vapour pressure?

At $T \ K$,the vapour pressure of an aqueous solution of a non-volatile solute,whose mole fraction is $0.02$,is found to be $34.65 \ mm \ Hg$. What is the vapour pressure (in $mm \ Hg$) of pure water at the same temperature?

In a solution,the mole ratio of pentane $(A)$ and hexane $(B)$ is $1:4$. At $20^o C$,the vapor pressures of these pure hydrocarbons are $440 \ mm$ and $120 \ mm$ respectively. The mole fraction of pentane in the vapor phase is.....

Vedclass Test Series

Exam Paper Generator

Online Exam Module