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Henry Krasner 1C
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Joined: Fri Sep 28, 2018 12:15 am


Postby Henry Krasner 1C » Sun Mar 10, 2019 5:53 pm

Do we calculate the order of a reaction by looking at its molecularity (or adding the reactants for the overall order)?

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

Re: Orders

Postby Lisa Werner 2F » Sun Mar 10, 2019 6:00 pm

the order of a reaction is equal to the sum of the powers of each term in the rate law. for example, if you had rate=[A]^2[B]^1[C]^3 then 2+1+3=6 so the order of the reaction described by that particular rate law would be 6

Srikar_Ramshetty 1K
Posts: 64
Joined: Fri Sep 28, 2018 12:27 am

Re: Orders

Postby Srikar_Ramshetty 1K » Sun Mar 10, 2019 6:42 pm

You should pay attention to their molecularities, which is similar to adding the reactants bit not entirely the same.
For example, A+A -> P and A+B -> P are both Bimolecular but do not provide for the same rate law. Rate = k[A]^2 and Rate =k[A][B], respectively.

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