Physics: Principles with Applications (7th Edition)

Published by Pearson
ISBN 10: 0-32162-592-7
ISBN 13: 978-0-32162-592-2

Chapter 15 - The Laws of Thermodynamics - Misconceptual Questions: 7

Answer

Choice D.

Work Step by Step

Don’t use Celsius degrees or you will get the wrong efficiency of 50 percent. Convert the temperature to kelvin, and use equation 15–5 to compute the upper limit on the efficiency of about 34 percent. $$1-\frac{T_{low}}{T_{high}} = 1-\frac{573 K}{873 K} = 0.34$$
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