Chemistry: The Molecular Science (5th Edition)

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

Chapter 9 - Liquids, Solids, and Materials - Questions for Review and Thought - Review Questions - Page 421: 5

Answer

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Work Step by Step

We know that the heat of fusion is the amount of energy needed to melt a solid at a given constant temperature. Since the heat of crystallization is an opposite process, we know that it has an opposite sign.
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