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pfaction

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TBR 9.4:

What is the reaction order for the following one step reaction:

2 NO2 -> 2NO + O2

So obviously it's going to be rate = k[NO]^2 is second order.

But what about the rate itself? Would it be, -1/2[NO]^2 = (1/2)[NO^2] = [O]?
 

chiddler

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2cb2090fc10f8c18348e7fbea98ac4ef.png


which means that you do not consider order in this way of writing the rate equation. only depends on stoichiometric coefficient.
 

pfaction

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Really, because there was a question on TPR's exams and I derived this directly from there.
2A -> 2B + C

= -1/2[A] = (1/2) + [C]


It's also heavy during TBR Ch 9 Gen Chem.
 
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