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At one litre vessel contains oxygen gas ...

At one litre vessel contains oxygen gas saturated with water vapour at 760 torr and `25^(@)C`. At constant temperature, if the gaseous mixture transferred into 500 ml vessel, find out the total pressure in the new vessel. (aqueous tension at `25^(@)C` = 23.8 torr)

Text Solution

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In one litre vessel `P_(O_(2)) + P_(H_(2)O) = 750` torr
`P_(H_(2)O) = 23.8` torr , `P_(O_(2)) = 760-23.8 = 736.2` torr
When gaseous mixure transferred into 500 ml flask, partial pressure of oxygen is doubled but aqueous tension remains constant because some water vapour condenses to water
Pressure in 500 ml flask ` = P_(O_(2)) + P_(H_(2)O) = 736.2 xx 2 + 23.8 = 1472.4 + 23.8 = 1496.2` torr
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