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### Kinetics

Posted: Fri Feb 12, 2016 9:20 pm
How would you determine the molecularity of a reaction?

### Re: Kinetics

Posted: Fri Feb 12, 2016 9:38 pm
Molecularity is determined by the number of species in an elementary step:

A -> D: unimolecular
A + B -> D: bimolecular
A + A -> D: bimolecular
A + B + C -> D: termolecular
A + B + B -> D: termolecular

### Re: Kinetics

Posted: Sun Feb 14, 2016 5:09 pm
In other words, molecularity is simply the number of reactants participating in a reaction.

For example, $O_{3}\rightarrow O_{2}+O$ is unimolecular, whereas its reverse reaction, $O_{2}+O\rightarrow O_{3}$, is bimolecular.