Elementary Rate Laws

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Caitlin Dillon 3G
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Joined: Wed Sep 21, 2016 2:56 pm

Elementary Rate Laws

Postby Caitlin Dillon 3G » Sun Feb 19, 2017 9:44 pm

Why can you take the coefficient before a molecule and include it in the exponent in the rate law for elementary rxns, but you can't do this for first order or second order rxns?

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Joined: Fri Jul 22, 2016 3:00 am

Re: Elementary Rate Laws

Postby AlyssaD_2K » Mon Feb 20, 2017 4:46 pm

I think it's because the overall reaction may have multiple elementary steps, but the elementary reaction itself is the simplest. Because of this, we can use the coefficients for the elementary reaction in its rate law. Since we do not know the mechanism behind the overall reaction, we can't do this. I think this is why, and I'm sorry if I'm wrong!

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