Q. 28

Pressure exerted by saturated water vapour is called aqueous tension. What correction term will you apply to the total pressure to obtain pressure of dry gas?

Answer :

The gas collected over water is called moist and pressure exerted by saturated water vapour is called aqueous tension.

The total pressure of the gas is P moist gas = P dry gas


As exerted water vapour is present i.e. aqueous tension.Which is correction term from total pressure.


By applying this correction term we get a new equation,shown below -


P dry gas =P moist gas – aqueous tension


Therefore, the correction term applied to the total pressure of the gas to get the pressure of dry gas is P moist gas – aqueous tension


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