At 120°C, the vapour pressure of pure chlorobenzene (C6H5Cl) is 0.736 atm What is the vapour pressure of a solution of 5.00 g of naphthalene (C10H8) in 50.0 g of chlorobenzene? (Assume that naphthalene is not volatile)

Question

At 120°C, the vapour pressure of pure chlorobenzene (C6H5Cl) is 0.736 atm What is the vapour pressure of a solution of 5.00 g of naphthalene (C10H8) in 50.0 g of chlorobenzene? (Assume that naphthalene is not volatile) (A) 0.736 atm (B) 0.091 atm (C) 0.677 atm (D) 1.00 atm

Tardigrade Admin · Accepted Answer

(0.736-Ps/0.736)=((5/152)/(5)152+(50)112.5 On solving P/s)=0.677 atm

Q. At $12 0^{\circ} C$ , the vapour pressure of pure chlorobenzene $(C_{6} H_{5} Cl)$ is $0.736 a t m$ What is the vapour pressure of a solution of 5.00 g of naphthalene $(C_{10} H_{8})$ in 50.0 g of chlorobenzene? (Assume that naphthalene is not volatile)

$0.736 a t m$

$0.091 a t m$

$0.677 a t m$

$1.00 a t m$

$\frac{0.736 - P _{s}}{0.736} = \frac{\frac{5}{152}}{\frac{5}{152} + \frac{50}{112.5}}$
On solving $P_{s} = 0.677 a t m$

Q. At 120∘C, the vapour pressure of pure chlorobenzene (C6​H5​Cl) is 0.736atm What is the vapour pressure of a solution of 5.00 g of naphthalene (C10​H8​) in 50.0 g of chlorobenzene? (Assume that naphthalene is not volatile)

0.736atm

0.091atm

0.677atm

1.00atm