p i = x i p i 0

where

p i = partial pressure of i th gas

x i = mole fraction of i th gas in gaseous mixture

x i = mole fraction of i th gas in gaseous mixture

p i = pressure of i th gas in pure state

According to Dalton's law of partial pressure, the total pressure by the mixture of non-reactive gases is equal to the sum of the partial pressures of individual gases.

p lotal = p 1 + p 2 + p 3

Also, p i = x i p; where p i and x i are the partial pressure and mole fraction of i th gas respectively and p is the total pressure.

P Total =p 1 +p 2 + p 3

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