Rate Laws and Order of a Reaction

Determining the Order of a Reaction from Its Rate Law

We need to know the rate law of a reaction in order to determine:

For the rate law

Rate law equation

Note: the stoichiometric coefficient in the balanced equation for a chemical reaction is usually different from the order.

reactionexperimental rate laworder
NO2 + COarrowNO + CO2 rate = k[NO2]2 2nd order reaction
2nd order in NO2
0 order in CO
CH3CHOarrowCH4 + CO rate = k[CH3CHO]2 2nd order reaction
2nd order in CH3CHO


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