## Molecularity

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RyanTran2F
Posts: 44
Joined: Thu Jul 27, 2017 3:00 am

### Molecularity

When we talk about molecularity, is it ONLY used to describe the number of species in an elementary step or will it ever be used to describe a regular overall reaction? Thanks :)

joycelee1A
Posts: 30
Joined: Fri Sep 29, 2017 7:05 am

### Re: Molecularity

The textbook defines molecularity as the number of reactant molecules or species taking part in a specified elementary reaction, so I would think that it has to do with the elementary step and not the overall reaction.

Michelle Chernyak 1J
Posts: 33
Joined: Fri Sep 29, 2017 7:06 am

### Re: Molecularity

Molecularity is only used to describe elementary reactions

Kailey Brodeur 1J
Posts: 34
Joined: Thu Jul 27, 2017 3:00 am

### Re: Molecularity

Molecularity cannot be used to describe an overall reaction because you cannot confirm which species are colliding from the overall reaction. You cannot tell which species are interacting with each other (bimolecular, termolecular) or reacting with itself (unimolecular), so molecularity is not helpful for an overall reaction.