Conceptual Physics (12th Edition)

Published by Addison-Wesley
ISBN 10: 0321909100
ISBN 13: 978-0-32190-910-7

Chapter 15 - Think and Explain: 51

Answer

A molecule in a gram of steam.

Work Step by Step

The steam is at a higher temperature, so the steam molecules have a higher average KE/speed than ice molecules. A randomly chosen molecule from the steam is likely to have more kinetic energy than one randomly chosen from ice.
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