Chemistry (12th Edition)

Published by Prentice Hall
ISBN 10: 0132525763
ISBN 13: 978-0-13252-576-3

Chapter 2 - Matter and Change - 2.4 Chemical Reactions - 2.4 Lesson Check: 33

Answer

The signs for chemical change are transfer of energy, color change, production of a gas, or formation of a precipitate.

Work Step by Step

Chemical change happens when substances react and that change is irreversible and cannot be changed. These changes involve energy transfer, color change, gas formation, precipitate (solid) formation.
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