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 553a: 11

Answer

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Work Step by Step

a) From the table, doubling the concentration of NO, at the same O2 concentration, leads to the reaction rate being quadrupled, so the reaction is of order 2 in NO. Doubling the concentration of O2, at the same NO concentration, leads to the reaction rate being doubled, so the reaction is of order 1 in O2. b) $r=k[NO]^2[O_2]$ c) From the first line of the table: $2.5\times10^{-5}\ mol/L.s=k(0.01\ mol/L)^2(0.01\ mol/L)$ $k=25.0\ L^2/mol^2.s$ d) $r=25\times(0.015)^2(0.005)=2.81\times10^{-5}\ mol/L.s$ e) From stoichiometry, NO2 is being formed at $1.0\times10^{-4}\ mol/L.s$ and O2 is reacting at $0.5\times10^{-4}\ mol/L.s$
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