Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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After 46.0 min, 24.0% of a compound has decomposed. What is the half-life of this reaction assuming first-order kinetics?
t1/2 =
min
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Expert Solution
Step 1:
For a first order reaction , the integrated rate equation is
K = 2.303/t log[ a/(a-x) ]
K = rate constant
t = time
a = initial percentage of reactants
x = percentage decomposed
The relation between half - life ( t 1/2 ) and rate constant ( K ) is
t 1/2 = 0.693 / K
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