Giancoli 7th Edition textbook cover
Giancoli's Physics: Principles with Applications, 7th Edition
15
The Laws of Thermodynamics
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15-1 and 15-2: First Law of Thermodynamics
15-3: Human Metabolism
15-5: Heat Engines
15-6: Refrigerators, Air Conditioners, Heat Pumps
15-7: Entropy
15-10: Statistical Interpretation
15-11: Energy Resources

Question by Giancoli, Douglas C., Physics: Principles with Applications, 7th Ed., ©2014, Reprinted by permission of Pearson Education Inc., New York.
Problem 19
Q

What is the maximum efficiency of a heat engine whose operating temperatures are 560C560 ^\circ \textrm{C} and 345C345 ^\circ \textrm{C}?

A
25.8%25.8 \%
Giancoli 7th Edition, Chapter 15, Problem 19 solution video poster
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VIDEO TRANSCRIPT

This is Giancoli Answers with Mister Dychko. The ideal efficiency is the efficiency of a Carnot engine and that's going to be one minus the low temperature reservoir divided by the high temperature reservoir. So, that's one minus 345 degrees Celsius plus 274 to convert that into Kelvin and then divide by the high temperature of 560 degrees Celsius converted to Kelvin. That gives 25.8 percent efficiency.

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