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  • The reaction of ozone with oxygen atoms in the presence of chlorine atoms can occur by a two step process shown below : O3(g) + Cl•(g) → O2(g) +

The reaction of ozone with oxygen atoms in the presence of chlorine atoms can occur by a two step process shown below :

O3(g) + Cl•(g) → O2(g) + ClO•(g)  ____ (i)

                   ki = 5.2 × 109 L mol−1 s−1  

ClO•(g) + O•(g) → O2(g) + Cl•(g)  ____ (ii)

                  kii = 2.6 × 1010 L mol−1 s−1

The closest rate constant for the overall reaction O3(g) + O•(g)  → 2 O2(g) is :

Option: 1

5.2 × 109 L mol−1 s−1


Option: 2

2.6 × 1010 L mol−1 s−1


Option: 3

3.1 × 1010 L mol−1 s−1


Option: 4

1.4 × 1020 L mol−1 s−1


Answers (1)

best_answer

The rate constant of the overall reaction depends on the slowest step. Hence equation(i) is the slowest step.

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