Chemistry: An Introduction to General, Organic, and Biological Chemistry (12th Edition)

Published by Prentice Hall
ISBN 10: 0321908449
ISBN 13: 978-0-32190-844-5

Chapter 7 - Section 7.8 - Energy in Chemical Reactions - Additional Questions and Problems - Page 249: 7.90a

Answer

This is a decomposition reaction.

Work Step by Step

In a decomposition reaction, a compound splits into two or more simpler compounds. The pattern for that type of reaction is: $AB --\gt A + B$ Therefore, when a compound breaks apart into its element, a decomposition reaction occurs.
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