A very large value of the equilibrium constant Kc indicates that
- A. the reaction reaches equilibrium very quickly
- B. the reaction is exothermic
- C. the reactants are favoured at equilibrium
- D. the products are strongly favoured at equilibrium
Explanation
Kc compares product to reactant concentrations, so a large value means the equilibrium position lies far to the right and the reaction goes almost to completion. Kc says nothing at all about how fast equilibrium is reached, which is a matter of kinetics, and this is the confusion the question targets. The Haber process is the classic case of a favourable equilibrium that is nevertheless slow without a catalyst.