Two liquids A and B have vapour pressure in the ratio `p_(B)^(@): p_(B)^(@) = 1:3` at a certain temperture. Assume A and B form an ideal solution and

Question

Two liquids A and B have vapour pressure in the ratio `p_(B)^(@): p_(B)^(@) = 1:3` at a certain temperture. Assume A and B form an ideal solution and

Two liquids A and B have vapour pressure in the ratio `p_(B)^(@): p_(B)^(@) = 1:3` at a certain temperture. Assume A and B form an ideal solution and the ratio of mole fractions of A and B in the vapour phase is 4:3 The mole fration of B in the solution at the same temperture is
A. 43470
B. 43499
C. 4/5 1/4
D.

Monjur Alahi

5 views

2025-01-04 04:42

1 Answers

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Salim Ahmed Kawsar · Accepted Answer · 2023-02-05T15:29:48+06:00

Salim Ahmed Kawsar

Correct Answer - a
`Y_(A)=P_(A)/P=(P_(A)^(@)X_(A))/P,Y_(B)=P_(B)/P=(P_(B)^(@)X_(B))/P`
`Y_(A)/Y_(B)=P_(A)^(@)/P_(B)xxX_(A)/X_(B)`
Mole fraction in V.P. `prop` vapour phase in vapour phase (Y).
`4/3=1/3xxX_(A)/((1-X_(A)))`
`X_(A)/((1-X_(A)))=4 or (1-X_(A))/X_(A)=1/4`
`X_(A)=4/5 or X_(B)=1/5`

5 views Answered 2023-02-05 15:29