A vessel of water is put in a dry, seale...

A vessel of water is put in a dry, sealed room of volume `50m^(3)` at a temperature `27^(@)C`. The saturated vapour pressure of water at `27^(@)C` is `40mm` of mercury. How much water will evaporate before the water is in equilibrium with its vapour?
(Relative density of mercury `=13.6, g=9.8ms^(-2)` and `=8.3Jmol^(-1)K^(-1)`)

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The correct Answer is:

`1.927kg`

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