Question

partial pressure of a dry gas is less than that of wet gas why?​

Answer 1

Dalton's law of partial pressures

claims that the total pressure of a sample of gas

is the sum of all the partial pressures of the gases in the mix

if we have a gas plus water vapor

then

Ptotal = Pg + Pv

and Pg must be lower than Ptotal as long as vapor pressure is not zero

Answer 2

Explanation:

When the gas is collected over water, it is moist bcuz of the water vapours. Saturated water vapours exert its own partial pressure called aqueous tension.So,in order to calculate the partial pressure of a dry gas, aquesous tension is subtracted from the pressure of the moist gas.(P moist_gas or P total)

which gives a relation..

P_dry_gas=P_total - Aqueous tension

hope it helps.

mark as brainliest!!