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Stoichiometric coefficients vs order

Posted: Wed Mar 11, 2020 12:38 am
by WYacob_2C
When do the orders of the rate equal the stoichiometric coefficients of a reaction, and when do they not? Thank you in advance.

Re: Stoichiometric coefficients vs order

Posted: Wed Mar 11, 2020 1:30 am
by Deepika Reddy 1A
I believe that the stoichiometric coefficients can be used when we are dealing with reaction mechanisms but can not be used for overall order reactions and finding the overall reaction rate. For overall reaction rates, experimental evidence needs to be used.

Re: Stoichiometric coefficients vs order

Posted: Wed Mar 11, 2020 7:36 am
by Ashley Tran 2I
The overall reaction order will the same as the stoichiometric coefficient of the rate determining step. Otherwise, each mechanism rate will have its respective order from that step's stoichiometric coefficients.

Re: Stoichiometric coefficients vs order

Posted: Wed Mar 11, 2020 7:51 am
by Max Madrzyk Dis 4G
The stoichiometric coefficients are equal to the order for the reactants of the rater determining step or the slow step.

Re: Stoichiometric coefficients vs order

Posted: Wed Mar 11, 2020 8:48 am
by Tyler Angtuaco 1G
They are the same as order for individual steps of a reaction, but not the overall reaction.