Chemistry: The Molecular Science (5th Edition)

Published by Cengage Learning
ISBN 10: 1285199049
ISBN 13: 978-1-28519-904-7

Chapter 11 - Chemical Kinetics: Rates of Reactions - Questions for Review and Thought - Topical Questions - Page 523a: 17a


$-\frac{\Delta [N_{2}O_{4}]}{\Delta t}$

Work Step by Step

The rate of a reaction in terms of a reactant with stoichiometric coefficient 1 is equal to $-\frac{\Delta [R]}{\Delta t}$ where [R] is the concentration of the reactant. Here, R or the reactant is $N_{2}O_{4}$. Hence the rate of reaction= $-\frac{\Delta [N_{2}O_{4}]}{\Delta t}$. Note that $\Delta [N_{2}O_{4}]$ is multiplied with -1 to make the rate of the reaction a positive quantity.
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