Question on: SS3 Chemistry - Chemical Equilibrium

The equilibrium constant (Kp) is expressed in terms of the partial pressures of reactants and products when the reaction involves gases. It is used when dealing with gaseous equilibria and is determined by writing the partial pressures of products raised to their stoichiometric coefficients in the numerator and the partial pressures of reactants raised to their respective stoichiometric coefficients in the denominator.