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Why is the vapour pressure of liquid con...

Why is the vapour pressure of liquid constant at a constant temperature ?

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Vapour pressure is the pressure of the vapour at equilibrium state when the rate of evaporation becomes equal to the rate of condensation. The equilibrium constant does not change at a particular temperature and therefore the vapour pressure remains constant.
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Knowledge Check

  • Vapour pressure of a liquid depends on

    A
    Volume of container
    B
    Amount of liquid
    C
    Surface area of container
    D
    Temperature

  • The vapour pressure of a liquid depends upon

    A
    the amount on the liqiud taken
    B
    the temperature of ht liquid
    C
    both on the amount as well as temperature
    D
    neither the amount nor the temperature but only on the nature of the liquid

  • The vapour pressure of a liquid in a closed vessel

    A
    depandes upon the amount of the liquid taken s
    B
    Keeps on increasing continously as more and more liquid evaporates
    C
    has a constant value depending only on the nature of the liquid
    D
    had a constant value at constant temperature

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    When pressure is increased at constant temperature.

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    The vapour pressure of any liquid shows following change with temperature :-

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