What will be the pressure of the gaseous mixture when 0.5 L of H2 at 0.8 bar and 2.0 L of dioxygen at 0.7 bar are introduced in a 1L vessel at 27°C?


Let the partial pressure of hydrogen in the vessel be Pa.

P1 = 0.8 bar,


V1 = 0.5L


V2 = 1L


P2 = Pa


Now, at constant temperature


P1V1 = P2V2



Pa = 0.4 bar


Similarly, for oxygen we get the partial pressures of oxygen as



Pb = 1.4 bar


It is known that,


The total pressure exerted is the sum of partial pressures so total pressure is (1.4+0.4) = 1.8 bar.


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