Question

what is meant by vapour pressure?? plz ans​

Answer 1

Answer

Vapour Pressure of liquid solutions is the amount of pressure that the vapours exert on the liquid solvent when they are in equilibrium and a certain temperature. Vapour pressure changes with the temperature of the surroundings and the nature of the liquid.

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Answer 2

"The pressure exerted by vapours of liquid on the surface of liquid when equilibrium is established between liquid and it's vapour is called VAPOUR PRESSURE of liquid."

The vapour pressure of the liquid depends on the nature of the liquid and temperature. With increase of intermolecular force of attraction vapour pressure of liquid decrease and with rise of temperature vapour pressure of liquid increases.

Mercury manometer may be used to determine vapour pressure of liquid.

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