A particular reactant decomposes with a half‑life of 165 s when its initial concentration is 0.340 M. The same reactant decomposes with a half‑life of 209 s when its initial concentration is 0.268 M. Determine the reaction order. What is the value and units of the rate constant for this reaction?

Chemistry: The Molecular Science
5th Edition
ISBN:9781285199047
Author:John W. Moore, Conrad L. Stanitski
Publisher:John W. Moore, Conrad L. Stanitski
Chapter11: Chemical Kinetics: Rates Of Reactions
Section: Chapter Questions
Problem 114QRT
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A particular reactant decomposes with a half‑life of 165 s when its initial concentration is 0.340 M. The same reactant decomposes with a half‑life of 209 s when its initial concentration is 0.268 M.

Determine the reaction order.
What is the value and units of the rate constant for this reaction?
Expert Solution
Step 1

Given:

The half-life of 0.340 M reactant is 165 s.

The half-life of 0.268 M reactant is 209 s.

To find:

Order of reaction, value, and unit of rate constant.

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