Horvath Practice Problems 14

Horvath Practice Problems 14 - A 00 Unimolecular A 00 + 2 B...

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Thus one would say this reaction is of order n A in A ,o forder n B in B, and of overall order n A + n B . It is very important to note that n A and n B generally do not have any relation to the stoichiometric factors a and b. Elementary Reactions and Molecularity In general an overall reaction is made up of so called elementary reactions Reactant Product overall rxn (2.6) Reactant Intermediates Product Note that we shall use an equal sign when talking about the overall reaction and arrows when talking about the elementary reactions Example Let 2 A +2 B C + D (2.7) be the overall reaction. One possible set of elementary steps could be elementary rxn molecularity A + A A 0 Bimolecular A 0
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Unformatted text preview: A 00 Unimolecular A 00 + 2 B → C + D Trimolecular . The rate laws for elementary reactions can be determined from the stoichiometry molecularity elementary rxn rate law Unimolecular A → Product v = k [ A ] Bimolecular A + A → Product v = k [ A ] 2 Bimolecular A + B → Product v = k [ A ][ B ] Trimolecular A + A + A → Product v = k [ A ] 3 Trimolecular A + A + B → Product v = k [ A ] 2 [ B ] Trimolecular A + B + C → Product v = k [ A ][ B ][ C ] . Conversely, rate laws for overall reactions can not be deter-mined by stoichiometry. DIFFERENTIAL RATE LAWS 13...
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This document was uploaded on 11/01/2011 for the course CHM 2046 at University of Florida.

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