The units of a rate constant for zero, first, and second order reactions are given in the textbook. If the time units are minutes, what would you expect the units to be for a third order reaction?

1) 1/min^3
2) mol^2/L^2-min
3) L/mol-min^2
4) L^2/mol^2-min
5) L^2/mol^2-min^2

I think that the answer is L/mol-min^2. Is this correct?

1. I don't think so.
rate = k(A)^3 so
k = rate/(A)^3
Plug in mol/L*min for rate and plug in moles^3/L^3 for A^3 and go through the algebra.

posted by DrBob222

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