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The partial pressure of vapor molecules ...

The partial pressure of vapor molecules above the surface of a liquid at equilibrium at a given temperature is the …… of the liquid at that temperature.

A

equilibrium vapor pressure

B

saturated vapor pressure

C

vapor pressure

D

all of these

Text Solution

Verified by Experts

The correct Answer is:
D
When a liquid evaporates , its gas molecules exert a pressure . Initially , the pressure exerted by vapors on the walls of the container increases. After some time , it becomes constant, when an equilibrium is established between the liquid phase and the vapour phase. The pressure of vapor measured under dynamic equilibrium vapor pressure or saturated vapor pressure or , simply , vapor pressure.
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Knowledge Check

  • Molecules on the surface of a liquid in equilibrium possess

    A
    Minimum K.E
    B
    Maximum P.E
    C
    Minimum P.E
    D
    Maximum K.E

  • Molecules on the surface of the liquid have

    A
    maximum kinetic energy
    B
    minimum kinetic energy
    C
    maximum potential energy
    D
    minimum potential energy

  • The molecules on the liquid surface

    A
    experience a net inward force from liquid molecules inside the liquid .
    B
    possess maxium K.E .
    C
    possess zero potential energy .
    D
    do not experence a force due to surface tension

    • Similar Questions

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    How does the surface tension of a liquid vary with increase in temperature ?

    On the surface of the liquid in equilibrium , molecules of the liquid possess

    A : Evaporation occurs at any temperature whereas the boiling point depends on the external pressure. R : Evaporation of a liquid occurs from the surface of a liquid at all temperature whereas boiling takes place at a temperature determined by the external pressure.

    In liquid gas equilibrium, the pressure of vapours above the liquid is constant at

    Surface tension of a liquid ……… as the temperature is raised.

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