7A7

[smurphy1D]

Why are all of the units different for each order of reaction?

[asannajust_1J]

the units for k are 1/M^(n-1)*s. n being the order of the reaction. Thus, if the reaction is first order the units are 1/s and second order 1/Ms and so on.

[Luc Zelissen 1K]

For order zero, the rate constant has units of mol·L−1·s−1 (or M·s−1)
For order one, the rate constant has units of s−1
For order two, the rate constant has units of L·mol−1·s−1 (or M−1·s−1)
And for order three, the rate constant has units of L2·mol−2·s−1 (or M−2·s−1)

[Tanmay Singhal 1H]

they use different ratios and thus the units are different