Chemistry and Chemical Reactivity (9th Edition)

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

Chapter 18 Principles of Chemical Reactivity: Entropy and Free Energy - 18-5 Entropy Changes and Spontaneity - Review & Check for Section 18-5 - Page 696: 1

Answer

B

Work Step by Step

N2g 2-O2g 2-NO2g $\Delta S_r^0=2S^0(NO_2(g))-2S^0(O_2(g))-S^0(N_2(g))$ $\Delta S_r^0=2\times240.04-2\times205.07-191.56$ $\Delta S_r^0=-121.62\ J/K.mol-rxn$
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