Essential University Physics: Volume 1 (3rd Edition)

Published by Pearson
ISBN 10: 0321993721
ISBN 13: 978-0-32199-372-4

Chapter 19 - Exercises and Problems - Page 350: 38


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Work Step by Step

Using an energy flow diagram, we see that if an engine was perfectly efficient, we could complete the cycle so that energy could be extracted from a cool reservoir to a warmer one. By definition, this is a refrigerator, meaning that the existence of a fully efficient engine would imply the existence of a fully efficient refrigerator.
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