Explanation In the cycle of changes, as the working substance returns to its initial state, therefore, there is no change in its internal energy that is △ E int = d U = 0 (I) If Q c is the amount of heat extracted per cycle from the cold reservoir at lower temperature T c W = work done per cycle on the system- the refrigerant. If Q h is the amount of heat released per cycle from the source at higher temperature T h The net amount of heat absorbed is given by d Q = Q c − Q h (II) Work done by the system is given by d W = − W (III) According to the first law of thermodynamics d Q = d U + d W (IV) Substituting the values of dU and dQ from equation (I) and (II) in equation (IV) Q c − Q h = 0 − W W = Q h − Q c W = Q c [ Q h Q c

Physics for Scientists and Engineers: A Strategic Approach with Modern Physics (Chs 1-42) Plus Mastering Physics with Pearson eText -- Access Card Package (4th Edition)

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ISBN: 9780133953145

Author: Randall D. Knight (Professor Emeritus)

Publisher: PEARSON

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First law of Thermodynamics

The word thermodynamics consists of two words: thermo- and dynamics. Dynamics means the study of motion. The field of thermodynamics is all about the study of the movement of heat. In a more meaningful way, it is stated as the study of the transfer of en…

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Chapter 21, Problem 40EAP

To determine

COP=TcTh−Tc

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Chapter 21, Problem 39EAP

Chapter 21, Problem 41EAP

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Physics for Scientists and Engineers: A Strategic Approach with Modern Physics (Chs 1-42) Plus Mastering Physics with Pearson eText -- Access Card Package (4th Edition)

Ch. 21 - Prob. 1CQ Ch. 21 - Rank in order, from largest to smallest, the...Ch. 21 - Prob. 3CQ Ch. 21 - FIGURE Q21.4 shows the pV diagram of a heat...Ch. 21 - Rank in order, from largest to smallest, the...Ch. 21 - FIGURE Q21.6 shows the thermodynamic cycles of two...Ch. 21 - A heat engine satisfies Wout= Qnet. Why is there...Ch. 21 - Prob. 8CQ Ch. 21 - Prob. 9CQ Ch. 21 - Prob. 10CQ

Ch. 21 - Prob. 11CQ Ch. 21 - Prob. 1EAP Ch. 21 - Prob. 2EAP Ch. 21 - Prob. 3EAP Ch. 21 - Prob. 4EAP Ch. 21 - Prob. 5EAP Ch. 21 - Prob. 6EAP Ch. 21 - The power output of a car engine running at 2400...Ch. 21 - Prob. 8EAP Ch. 21 - Prob. 9EAP Ch. 21 - Prob. 10EAP Ch. 21 - Prob. 11EAP Ch. 21 - Prob. 12EAP Ch. 21 - Prob. 13EAP Ch. 21 - Prob. 14EAP Ch. 21 - Prob. 15EAP Ch. 21 - Prob. 16EAP Ch. 21 - A heat engine uses a diatomic gas in a Brayton...Ch. 21 - At what pressure ratio does a Brayton cycle using...Ch. 21 - Prob. 19EAP Ch. 21 - Prob. 20EAP Ch. 21 - Prob. 21EAP Ch. 21 - Prob. 22EAP Ch. 21 - Prob. 23EAP Ch. 21 - Prob. 24EAP Ch. 21 - Prob. 25EAP Ch. 21 - Prob. 26EAP Ch. 21 - Prob. 27EAP Ch. 21 - A Carnot engine whose hot-reservoir temperature is...Ch. 21 - Prob. 29EAP Ch. 21 - A heat engine operating between energy reservoirs...Ch. 21 - Prob. 31EAP Ch. 21 - A Carnot refrigerator operating between —20°C and...Ch. 21 - The coefficient of performance of a refrigerator...Ch. 21 - A Carnot heat engine with thermal efficiency 1/3...Ch. 21 - Prob. 35EAP Ch. 21 - Prob. 36EAP Ch. 21 - A heat engine with 50% of the Carnot efficiency...Ch. 21 - Prove that the work done in an adiabatic process i...Ch. 21 - Prob. 39EAP Ch. 21 - Prob. 40EAP Ch. 21 - An ideal refrigerator utilizes a Carnot cycle...Ch. 21 - Prob. 42EAP Ch. 21 - There has long been an interest in using the vast...Ch. 21 - A Carnot heat engine operates between reservoirs...Ch. 21 - A Carnot engine operates between temperatures of...Ch. 21 - Prob. 46EAP Ch. 21 - A Carnot heat engine and an ordinary refrigerator...Ch. 21 - 48. A heat engine running backward is called a...Ch. 21 - 49. A car's internal combustion engine can be...Ch. 21 - Prob. 50EAP Ch. 21 - Prob. 51EAP Ch. 21 - Prob. 52EAP Ch. 21 - Prob. 53EAP Ch. 21 - Prob. 54EAP Ch. 21 - Prob. 55EAP Ch. 21 - Prob. 56EAP Ch. 21 - Prob. 57EAP Ch. 21 - A heat engine using a monatomic gas follows the...Ch. 21 - Prob. 59EAP Ch. 21 - Prob. 60EAP Ch. 21 - Prob. 61EAP Ch. 21 - Prob. 62EAP Ch. 21 - Prob. 63EAP Ch. 21 - Prob. 64EAP Ch. 21 - Prob. 65EAP Ch. 21 - Prob. 66EAP Ch. 21 - Prob. 67EAP Ch. 21 - Prob. 68EAP Ch. 21 - Prob. 69EAP Ch. 21 - Prob. 70EAP Ch. 21 - A refrigerator using helium gas operates on the...Ch. 21 - Prob. 72EAP Ch. 21 - The gasoline engine in your car can be modeled as...Ch. 21 - Prob. 74EAP

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