A kinetic study of the reaction: A → products provides the data: t = 0 s, [A] = 2.00 M; 500 s, 1.00 M; 1500 s, 0.50 M; 3500 s, 0.25 M. In the simplest possible way determine, whether this reaction is

Question

A kinetic study of the reaction: A → products provides the data: t = 0 s, [A] = 2.00 M; 500 s, 1.00 M; 1500 s, 0.50 M; 3500 s, 0.25 M. In the simplest possible way determine, whether this reaction is of

Prashant Kotian · Accepted Answer

Correct answer: C. Time for 2M to 1M is 500s. Time for 1M to 0.5M is 1000s (1500-500). Time for 0.5M to 0.25M is 2000s (3500-1500). Since the half-life doubles every time the initial concentration is halved, t1/2 ∝ 1/[A0], indicating a second-order reaction. Therefore, correct answer is C.

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