Chemistry: The Molecular Nature of Matter and Change 7th Edition

Published by McGraw-Hill Education
ISBN 10: 007351117X
ISBN 13: 978-0-07351-117-7

Chapter 20 - Problems: 20.28


See explanation below.

Work Step by Step

Molar entropy increases with increasing molecular complexity NO2(g) > NO(g) > N2(g) As number of atom increases molar entropy increases Fe3O4(s) > Fe2O3(s) > Al2O3(s) Here there are two case. Fe3O4(s) > Fe2O3(s) because molecualr complexity of Fe3O4(s) is more than Fe2O3(s). Fe2O3(s) > Al2O3 because size of iron is more than Aluminium (heavier atom has higher molar entropy)
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