Chemistry (12th Edition)

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

Chapter 2 - Matter and Change - 2 Assessment: 47

Answer

Sharpening a pencil is an irreversible change. Freezing water is a reversible change.

Work Step by Step

Sharpening a pencil is an irreversible change because you can't unsharpen a pencil and change it back to its original size. Freezing water is a reversible change because you can melt the water back to its original liquid form.
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