Question

Mixture of volatile components A and B has total pressure ( in Torr ) `p=265-130x_(A),` where `X_(A)` is mole fraction of `A` in mixture . Hence `P_(A)^(@)+P_(B)^(@)=` ( in T o r r).
A. 265
B. 135
C. 400
D. 150

Answer 1

Correct Answer - C
`P=X_(A)P_(A)^(@)+X_(B)P_(B)^(@)=(P_(A)^(@)-P_(B)^(@))X_(A)+P_(B)^(@)`
So`" "P_(B)^(@)=265`
`P_(A)^(@)-P_(B)^(@)=-130" "P_(A)^(@)=135`
`P_(A)^(@)+P_(B)^(@)=400`