Relating Kc and Kp in Gas Equilibria

Gas-phase equilibrium can be written using either concentration or pressure. The equilibrium constant may be shown as Kc, which uses molar concentration, or as Kp, which uses partial pressure of the reactants and products.

The link between Kc and Kp comes from the ideal gas equation and the defin...

For chemical reactions, where the reactants and products are all gases, the equilibrium constant can also be calculated using the individual partial pressures rather than their molar concentrations.

Thus, when gases A and B convert to gases C and D in a reversible reaction, the equilibrium expression can be written instead as the partial ...