Initial rates r0 for the reaction 2A + C → products at 300 K at various sets of initial concentrations are as follows (where c° ≡ 1 mol/dm3):
[A]0/c° | 0.20 | 0.60 | 0.20 | 0.60 |
[B]0/c° | 0.30 | 0.30 | 0.90 | 0.30 |
[C]0/c° | 0.15 | 0.15 | 0.15 | 0.45 |
100r0/(c°/s) | 0.60 | 1.81 | 5.38 | 1.81 |
(a) Assume that the rate law has the form (16.5) and determine the partial orders. (b) Evaluate the rate constant. (c) Explain why determining a rate law and rate constant using only initial-rate data can sometimes give erroneous results. (Hint: See Sec. 16.1.)
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