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Liquids A and B form an ideal solution i...

Liquids A and B form an ideal solution in the entire composition range. At 350K, the vapor pressure of pure A and pure B are `7xx10^(3)` Pa and `12xx10^(3)` Pa, respectively. The composition of the vapor in equilibrium with a solution containing 40 mole percent of A at this temperature is :

A

`x_(A)=0.76,x_(B)=0.24`

B

`x_(A)=0.4,x_(B)=0.6`

C

`x_(A)=0.37,x_(B)=0.63`

D

`x_(A)=0.28,x_(B)=0.72`

Text Solution

Verified by Experts

`P_(A)^(@)=7xx10^(3)P_(a)impliesP_(B)^(2)=12xx10^(3)P_(a)`
`P_(A)=P_(A)^(@)x_(A)=[7xx10^(3)][0.4]=2.8xx10^(3)`
`p_(B)=p_(B)^(@)x_(A)=[12xx10^(3)][0.6]=7.2xx10^(3)`
`x_(a)=(P_(A))/(P_(T))=2.8/10=0.28,x_(B)=0.72`
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