Write the rate law for the reaction, expressing k(overall) in terms of k1, k2, and k3.
Step 1: UV light + Cl2(g) ⇄ 2Cl(g)
Fast, Endothermic
Step 2: Cl(g) + O3(g) -> OCl(g) + O2(g)
Slow, Endothermic
Step 3: OCl(g) + NO(g) -> NO2(g) + Cl(g)
Fast, Exothermic