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Ozone in the earth's atmosphere decomposes according to the equation: 2 O3(g) → 3 O2(g) This reactioKinetics Chemistry Question

Question

Ozone in the earth's atmosphere decomposes according to the equation:
2 O3(g) → 3 O2(g)
This reaction is thought to occur via the two-step mechanism:
Step 1 O3(g) ⇌ O2(g) + O(g) Fast, reversible
Step 2 O3(g) + O(g) → 2 O2(g) Slow
What rate law is consistent with this mechanism?

A.

–∆[O3]/∆t = k[O3]

B.

–∆[O3]/∆t = k[O3]2

C.

–∆[O3]/∆t = k[O3]2/[O2]

✓ Correct
D.

–∆[O3]/∆t = k[O3]2/[O2]3

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