A solution is prepared containing a 2: 1 mol ratio of dibromoethane ( C 2 H 4 Br 2) and dibromopropane ( C 3 H 6 Br 2). What is total vapor pressure of the solution assuming ideal behaviour?

Question

A solution is prepared containing a 2: 1 mol ratio of dibromoethane ( C 2 H 4 Br 2) and dibromopropane ( C 3 H 6 Br 2). What is total vapor pressure of the solution assuming ideal behaviour? (A) 300 mm Hg (B) 142 mm Hg (C) 150 mm Hg (D) 158 mm Hg

Tardigrade Admin · Accepted Answer

<img class="img-fluid question-image" alt="image" src="https://cdn.tardigrade.in/img/question/chemistry/ae1b1f65df0a85a49c25357f8110c8a9-.png" /> p=pA+pB=pA° xA+pB° xB =173 × (2/3)+127 × (1/3) =(346+127/3)=(473/3) =157.6 ≈ 158 mm

Q. A solution is prepared containing a $2 : 1$ mol ratio of dibromoethane $(C_{2} H_{4} B r_{2})$ and dibromopropane $(C_{3} H_{6} B r_{2})$ . What is total vapor pressure of the solution assuming ideal behaviour?

$300 mm H g$

$142 mm H g$

$150 mm H g$

$158 mm H g$

$p = p_{A} + p_{B} = p_{A}^{\circ} x_{A} + p_{B}^{\circ} x_{B}$
$= 173 \times \frac{2}{3} + 127 \times \frac{1}{3}$
$= \frac{346 + 127}{3} = \frac{473}{3}$
$= 157.6 \approx 158 mm$

Q. A solution is prepared containing a 2:1 mol ratio of dibromoethane (C2​H4​Br2​) and dibromopropane (C3​H6​Br2​). What is total vapor pressure of the solution assuming ideal behaviour?

300mmHg

142mmHg

150mmHg

158mmHg