Bundle: Physics for Scientists and Engineers with Modern Physics, Loose-leaf Version, 9th + WebAssign Printed Access Card, Multi-Term

9th Edition

ISBN: 9781305932302

Author: Raymond A. Serway, John W. Jewett

Publisher: Cengage Learning

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Chapter 22, Problem 7CQ

The device shown in Figure CQ22.7, called a thermoelectric converter, uses a series of semiconductor cells to transform internal energy to electric potential energy, which we will study in Chapter 25. In the photograph on the left, both legs of the device are at the same temperature and no electric potential energy is produced. When one leg is at a higher temperature than the other as shown in the photograph on the right, however, electric potential energy is produced as the device extracts energy from the hot reservoir and drives a small electric motor. (a) Why is the difference in temperature necessary to produce electric potential energy in this demonstration? (b) In what sense does this intriguing experiment demonstrate the second law of thermodynamics?

Chapter 22, Problem 7CQ, The device shown in Figure CQ22.7, called a thermoelectric converter, uses a series of semiconductor

Figure CQ22.7

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Chapter 22, Problem 6CQ

Chapter 22, Problem 8CQ

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Chapter 22 Solutions

Bundle: Physics for Scientists and Engineers with Modern Physics, Loose-leaf Version, 9th + WebAssign Printed Access Card, Multi-Term

Ch. 22.1 - The energy input to an engine is 4.00 times...Ch. 22.2 - The energy entering an electric heater by...Ch. 22.4 - Three engines operate between reservoirs separated...Ch. 22.6 - (a) Suppose you select four cards at random from a...Ch. 22.7 - An ideal gas is taken from an initial temperature...Ch. 22.7 - True or False: The entropy change in an adiabatic...Ch. 22 - Prob. 1OQ Ch. 22 - Prob. 2OQ Ch. 22 - Prob. 3OQ Ch. 22 - Of the following, which is not a statement of the...

Ch. 22 - Prob. 5OQ Ch. 22 - Prob. 6OQ Ch. 22 - Prob. 7OQ Ch. 22 - Prob. 8OQ Ch. 22 - Prob. 9OQ Ch. 22 - Prob. 10OQ Ch. 22 - The arrow OA in the PV diagram shown in Figure...Ch. 22 - The energy exhaust from a certain coal-fired...Ch. 22 - Discuss three different common examples of natural...Ch. 22 - Prob. 3CQ Ch. 22 - The first law of thermodynamics says you cant...Ch. 22 - Energy is the mistress of the Universe, and...Ch. 22 - (a) Give an example of an irreversible process...Ch. 22 - The device shown in Figure CQ22.7, called a...Ch. 22 - A steam-driven turbine is one major component of...Ch. 22 - Discuss the change in entropy of a gas that...Ch. 22 - Prob. 10CQ Ch. 22 - Prob. 11CQ Ch. 22 - (a) If you shake a jar full of jelly beans of...Ch. 22 - What are some factors that affect the efficiency...Ch. 22 - A particular heat engine has a mechanical power...Ch. 22 - The work done by an engine equals one-fourth the...Ch. 22 - A heat engine takes in 360 J of energy from a hot...Ch. 22 - A gun is a heat engine. In particular, it is an...Ch. 22 - Prob. 5P Ch. 22 - Prob. 6P Ch. 22 - Suppose a heat engine is connected to two energy...Ch. 22 - Prob. 8P Ch. 22 - During each cycle, a refrigerator ejects 625 kJ of...Ch. 22 - Prob. 10P Ch. 22 - Prob. 11P Ch. 22 - Prob. 12P Ch. 22 - A freezer has a coefficient of performance of...Ch. 22 - Prob. 14P Ch. 22 - One of the most efficient heat engines ever built...Ch. 22 - Prob. 16P Ch. 22 - Prob. 17P Ch. 22 - Prob. 18P Ch. 22 - Prob. 19P Ch. 22 - Prob. 20P Ch. 22 - Prob. 21P Ch. 22 - How much work does an ideal Carnot refrigerator...Ch. 22 - Prob. 23P Ch. 22 - A power plant operates at a 32.0% efficiency...Ch. 22 - Prob. 25P Ch. 22 - Prob. 26P Ch. 22 - Prob. 27P Ch. 22 - Prob. 28P Ch. 22 - A heat engine operates in a Carnot cycle between...Ch. 22 - Suppose you build a two-engine device with the...Ch. 22 - Prob. 31P Ch. 22 - Prob. 32P Ch. 22 - Prob. 33P Ch. 22 - Prob. 34P Ch. 22 - Prob. 35P Ch. 22 - Prob. 36P Ch. 22 - Prob. 37P Ch. 22 - Prob. 38P Ch. 22 - Prob. 39P Ch. 22 - Prob. 40P Ch. 22 - Prob. 41P Ch. 22 - Prob. 42P Ch. 22 - A Styrofoam cup holding 125 g of hot water at 100C...Ch. 22 - Prob. 44P Ch. 22 - A 1 500-kg car is moving at 20.0 m/s. The driver...Ch. 22 - Prob. 46P Ch. 22 - Prob. 47P Ch. 22 - Prob. 48P Ch. 22 - Prob. 49P Ch. 22 - What change in entropy occurs when a 27.9-g ice...Ch. 22 - Calculate the change in entropy of 250 g of water...Ch. 22 - Prob. 52P Ch. 22 - Prob. 53P Ch. 22 - Prob. 54P Ch. 22 - Prob. 55P Ch. 22 - Prob. 56AP Ch. 22 - Prob. 57AP Ch. 22 - A steam engine is operated in a cold climate where...Ch. 22 - Prob. 59AP Ch. 22 - Prob. 60AP Ch. 22 - Prob. 61AP Ch. 22 - In 1993, the U.S. government instituted a...Ch. 22 - Prob. 63AP Ch. 22 - Prob. 64AP Ch. 22 - Prob. 65AP Ch. 22 - Prob. 66AP Ch. 22 - In 1816, Robert Stirling, a Scottish clergyman,...Ch. 22 - Prob. 68AP Ch. 22 - Prob. 69AP Ch. 22 - Prob. 70AP Ch. 22 - Prob. 71AP Ch. 22 - Prob. 72AP Ch. 22 - Prob. 73AP Ch. 22 - A system consisting of n moles of an ideal gas...Ch. 22 - A heat engine operates between two reservoirs at...Ch. 22 - Prob. 76AP Ch. 22 - Prob. 77AP Ch. 22 - Prob. 78AP Ch. 22 - A sample of an ideal gas expands isothermally,...Ch. 22 - Prob. 80AP Ch. 22 - Prob. 81CP

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Solution Summary: The author explains that the difference in temperature is necessary to produce electric potential energy in the demonstration.

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Chapter 22 Solutions