Cl(g) + O3(g) → ClO(g) + O2(g) (slow step) ClO(g) + O3(g) → Cl(g) + 2 O2(g) (fast step) 2 O3(g) → 3 — Kinetics Chemistry Question
Question
Cl(g) + O3(g) → ClO(g) + O2(g) (slow step)
ClO(g) + O3(g) → Cl(g) + 2 O2(g) (fast step)
2 O3(g) → 3 O2(g) (overall reaction) ΔH = −285 kJ/molrxn
When free Cl(g) atoms encounter O3(g) molecules in the upper atmosphere, the reaction mechanism represented above is proposed to occur. Which of the following rate laws for the overall reaction corresponds to the proposed mechanism?
A.
Rate = k[O3]^2
B.✓ Correct
Rate = k[Cl][O3]
C.
Rate = k[ClO][O3]
D.
Rate = k([O3]^2)/[O2]
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