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Molecularity and the Coefficient of an Elementary Step

Posted: Mon Mar 05, 2018 8:19 pm
by Hannah Guo 3D
Is there any association between the molecularity and the coefficient of an elementary step. For example, when the molecularity is termolecular, does it mean that the coefficients of the reactants in a balanced elementary step add up to be 3?
Thank you!

Re: Molecularity and the Coefficient of an Elementary Step

Posted: Mon Mar 05, 2018 9:59 pm
by Julie Steklof 1A
Molecularity is the number of species involved in an elementary step. So yes, for example a termolecular elementary step would have to have three reactants colliding which is seen in a reaction in which the stoichiometric coefficients add up to three.

Re: Molecularity and the Coefficient of an Elementary Step

Posted: Mon Mar 05, 2018 10:00 pm
by Yixin Angela Wang 2H
Yes, I believe that's correct. Molecularity is the number of reactants in a particular step, so for example a reaction that requires 2 molecules of one compound and 1 molecule of another would be 2A+B--->product, and it should be termolecular.