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A cylinder filled with a movable piston...

A cylinder filled with a movable piston contains liquid water in equilibrium with water vapour at `25^@C` . Which one of the following operations results in a decrease in the equilibrium vapour pressure ?

A

Moving the piston downward a short distance

B

Removing a small amount of vapour

C

Removing a small amount of liquid water

D

Dissolving some salt in the water.

Text Solution

Verified by Experts

The correct Answer is:
C
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Knowledge Check

  • A cylinder fitted with a movable piston contains liquid water in equilibrium with water vapour at 25^(@)"C" . Which of the following operation result will not in a decrease in the equilibrium vapour pressure at 25^(@)"C" ?

    A
    Moving the piston downward a short distance
    B
    Removing a small amount of vapour
    C
    Removing a small amount of liquid water
    D
    Dissolving some salt in the water.

  • Consider the following liquid -vapour equilibrium Liquid hArr Vapour Which of the following relations is correct.

    A
    `(dlnP)/( dT^(2))= - ( DeltaH _(v))/( T^(2))`
    B
    `(dlnP)/( dT)= ( DeltaH _(v))/( RT^(2))`
    C
    `(dlnS)/( dT^(2))= ( DeltaH _(v))/( RT^(2))`
    D
    `(dlnS)/( dT)= - ( DeltaH _(v))/( RT)`

  • Consider the following liquid-vapour equilibrium. "Liquid" hArr "Vapour" Which of the following relations is correct?

    A
    `(d ln P)/(dT) = (Delta H_(v))/(RT^(2))`
    B
    `(d ln G)/(dT^(2)) = (Delta H_(v))/(RT^(2))`
    C
    `(d ln P)/(dT) = (-Delta H_(v))/(RT^(2))`
    D
    `(d ln P)/(d T^(2)) = (-Delta H_(v))/(T^(2))`

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