Equilibrium Constants Kc and Kp

For aA + bB ⇌ cC + dD: Kc = [C]^c[D]^d / [A]^a[B]^b. Square brackets = molar concentration at equilibrium. Kp uses partial pressures: Kp = Kc(RT)^Δn where Δn = moles of products - moles of reactants. Large K: equilibrium favours products. Small K: favours reactants.