Consider the hypothetical reaction P₂ + Q₂ ⇌ 2 PQ. Provided in the table below are the rate constants of the forward and reverse reactions at different temperatures.

Determine if the reaction is endothermic or exothermic and justify your answer.

• A. The reaction is exothermic because as the temperature increases the k_r increases more than k_f.
• B. The reaction is endothermic because as the temperature increases the k_r increases more than k_f.