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A liquid in an open vessel cannot remain...

A liquid in an open vessel cannot remain in equilibrium with its vapour. Justify.

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At a fixed temperature, a liquid is in equilibrium with its vapours in a closed vessel. Which measurable quantity for the liquid gets fixed at equilibrium?

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Knowledge Check

  • Statement I : A cylinder fitted with a movable piston contains a certain amount of liquid in equilibrium with its vapour. The temperature of the system is kept constant with the help of a thermostat. When the volume of the vapour is decreased by moving the piston inwards, the vapour pressure does not increase. Statement II : Vapour in equilibrium with its liquid, at a constant temperature, does not obey Boyle's law.

    A
    Statement I is true, statement II is true , statement II is a correct explanation for statement I.
    B
    Statement I is true, statement II is true , statement II is not a correct explanation for statement I.
    C
    Statement I is true, statement II is false.
    D
    Statement I is false, statement II is true.

  • The chemical reaction AiffB remains in equilibrium when

    A
    A is completely converted to B
    B
    50% of A is `converted to B`
    C
    `Only 10% of A is converted to B`
    D
    The rate of conversion of A to B is same as the rate of conversion of B to A

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    A liquid is in equilibrium with its vapour in a sealed container at a fixed temperature. The volume of the container is suddenly increased. (1) What is the initial effect of the change on vapour pressure? (2) How do rates of evaporation & condensation change initially? (3) What happens when equilibrium is restored finally and what will be the final vapour pressure?

    A liquid is in equilibrium with its vapour at its boiling point. On average, the molecules in the two phases have -

    If two immiscible liquids in a U-tube are in equilibrium, then how are the heights of the two liquids from the surface of separation related with the densities of the two liquids?

    Why is the equilibrium established in the evaporation of a liquid in a closed vessel at constant temperature called dynamic equilibrium?

    When a liquid vaporises in a closed container, an equilibrium establishes between the liquid and its vapour. Will this equilibrlium be established if the liquid is vaporised in an open container? Given reason for your answer.

    A vessel has nitrogen gas and water vapour in equilibrium with liquid water at a total pressure of 1 atm. The partial pressure of water vapours is 0.3 atm. The volume of this vessel is reduced to one third of the original volume, at the same temperature, then total pressure of the system is: (Neglect volume occupied by liquid water)

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