Chemistry and Chemical Reactivity (9th Edition)

Published by Cengage Learning
ISBN 10: 1133949649
ISBN 13: 978-1-13394-964-0

Chapter 14 Chemical Kinetics: The Rates of Chemical Reactions - Study Questions - Page 553e: 53


$t_{1/2}=36.0\ s$

Work Step by Step

For first-order reactions: $\ln(C/C_0)=-kt=-0.693/t_{1/2}\times t$ $\ln 0.25=-0.693/t_{1/2}\times 72\ s$ $t_{1/2}=36.0\ s$
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