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Vapour Pressure

The equilibri...

Question

The equilibrium vapour pressure of water vapour over a 0.20 mole sample of liquid water is 35 torr at $27^{\circ} C$ . If the amount of the liquid water is decreased to 0.10 mole, the equilibrium vapour pressure of it would be

A

17.5 torr

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B

35.0 torr

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C

51.5 torr

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D

None of these

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Solution

The correct option is B 35.0 torr
The equilibrium vapour pressure will remain the same. It is independent of the quantity or the amount of substance. It depends only on temperature.

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Vapour Pressure

Standard XIII Chemistry

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