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Cecilia Jardon 1I
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Joined: Fri Sep 28, 2018 12:16 am


Postby Cecilia Jardon 1I » Sun Mar 10, 2019 1:50 pm

In lecture, Lavelle mentioned how unimolecularity exists in an A--> P reaction. I was not able to catch when he said how does one reactant collide with itself. Can someone explain please.

Aarti K Jain 1L
Posts: 30
Joined: Fri Sep 28, 2018 12:20 am

Re: Molecularity

Postby Aarti K Jain 1L » Sun Mar 10, 2019 1:53 pm

A unimolecular reaction isn't about collision, but more about a rearrangement of the molecule. For example, decomposition or radioactive decay can occur of a single molecule without any collisions occurring simply because the molecule is breaking apart/rearranging itself into multiple molecules.

Posts: 60
Joined: Fri Sep 28, 2018 12:26 am

Re: Molecularity

Postby mahika_nayak_3L » Sun Mar 10, 2019 2:40 pm

Molecularity refers to the number of species in an elementary step. In a unimolecular reaction, there is only one species in the elementary step. The reaction can be unimolecular if there is a rearrangement of a single molecule that produces product.

Lisa Werner 2F
Posts: 72
Joined: Fri Sep 28, 2018 12:17 am

Re: Molecularity

Postby Lisa Werner 2F » Sun Mar 10, 2019 6:05 pm

molecularity is based upon the number of types of reactant molecules in a reaction

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