[candiishop]

Chlorobenzene, C6H5Cl, and bromobenzene, C6H5Br, form essentially ideal solutions in all proportions. At 90°C, the equilibrium pressure of chlorobenzene is 267mmHg and that of bromobenzene is 128mmHg. Calculate the equilibrium vapour pressure above a 31.4% (w/w) solution of chlorobenzene in bromobenzene at a temperature of 90°C.


A) 213 mmHg

B) 182 mmHg

C) 223 mmHg

D) 17165 mmHg

E) 22335 mmHg
 
Need to use this Raoult's law formula:

P(solution) = x solvent . P solvent

I got B.. need to check with someone. Thanks
 

[Borek]

OK with me.

[alpinestarhero]

Use raoults law? I would have used the clapeyron equation

I think...

Matt

[Borek]

I would have used the clapeyron equation

T=const

[Donaldson Tan]

I will use Antoine's Equation to calculate the saturated vapour pressure, then use Raoult's Law to obtain the vapour pressure.

[Borek]

I will use Antoine's Equation to calculate the saturated vapour pressure

Why do you want to calculate something that is already given in the question?