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Liquids A and B form ideal solution over...

Liquids A and B form ideal solution over the entire range of composition . At temperature, T, equimolar binary solution of liquids A and B has vapour pressure 45 torr. At the same temperature, a new solution of A and B having molefraction `x_(A)` and `x_(B)` respectively, has vapour pressure of `22.5` torr. The value of `x_(A)//x_(B)` in the new solution is

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The correct Answer is:
19
Apply the equation `P=x_(A)P_(A)(0)+x_(B)P_(B)^(0)` twice
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Liquids A and B form ideal solution over the entire range of composition. At temperature T, equimolar binary solution of liquids A and B has vapour pressure 45 torr. At the same temperature, a new solution of A and B having mole fractions x_(A) and x_(B) , respectively, has vapours pressure of 22. torr. The value of x_(A)//x_(B) in the new solution is ______. (Given that the vapour pressure of pure liquid A is 20 torr at temperature T).

Liquid A and B from ideal solution over the entire range of composition. At temperature T, equimolar binary solution of liquids A and B vapour pressure 45 Torr. At the same temperature, a new solution of A and B having mole fractions x_(A) and x_(B) , respectively, has vapour pressure of 22.5 Torr. The value of X_(A)//x_(B) in the new solution is _________ (Given that the vapour pressure of pure liquid A is 20 Torr at temperature T)

Knowledge Check

  • An ideal solution of two pure liquids A and B are having the vapour pressure of 100 and 400 torr repsectively at the temperature T. The liquid solution of A and B is made up of 1 mole of each A and B. Then, find the pressure when 1 mole of mixture has been vapourized.

    A
    500 torr
    B
    600 torr
    C
    700 torr
    D
    200 torr

  • The diagram given below is a vapour pressure composition diagram for a binary solution of A and B. In the solution A-B interactions are

    A
    similar to `A-A` and `B-B` interactions
    B
    greater than A-A and B-B interactions
    C
    smaller than A-A and B-B interactions
    D
    unpredictable

  • In binary ideal solution forms by liquid A and B, at constant temperature, mole -fraction of liquid A in vapour state is 0.4 and its partial vapour pressure is 400 mm,then what will be the partial vapour pressure of B ?

    A
    600 mm
    B
    300 mm
    C
    500 mm
    D
    200 mm

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