Q. 313.7( 7 Votes )

Dihydrogen gas us

Answer :

The given reaction is CO (g) + H2O (g) CO2 (g) + H2 (g)

Given: Temperature = 400° C


Partial pressure of CO (PCO) = Partial pressure of H2O (PH2O) = 4.0 bar


Kp = 10.1 bar


Formula: Kp =


Let the partial pressure of H2 (PH2) at equilibrium = P bar



By applying the formula given below:


Kp =


Where Px and PY are the partial pressures of x and y(products)


PA and PB are the partial pressures of a and b (reactants)


Hence, Kp =


As Kp = 10.1 bar (given)


10.1 =


10.1 =


By taking square roots of both the sides, we get


√10.1 =


0.3178 =


12.712– 0.3178 P = P


4.178 P = 12.712


P = 3.042 bar


Thus, the partial pressure of H2 (PH2) at equilibrium = P bar = 3.042 bar.


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