Physics for Scientists and Engineers: A Strategic Approach, Vol. 1 (Chs 1-21) (4th Edition)
4th Edition
ISBN: 9780134110684
Author: Randall D. Knight (Professor Emeritus)
Publisher: PEARSON
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Chapter 21, Problem 7EAP
The power output of a car engine running at 2400 rpm is 500 kW. How much (a) work is done and (b) heat is exhausted per cycle if the engine's thermal efficiency is 20%? Give your answers in kJ.
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The power output of a car engine running at 2300 rpmrpm is 300 kW .
(a) How much work is done per cycle if the engine's thermal efficiency is 40.0 %?Give your answer in kJ.
Win =7.83kJ
(b)How much heat is exhausted per cycle if the engine's thermal efficiency is 40.0 %?Give your answer in kJ.
A heat engine receives heat in the amount of Qh= 525 kJ from a high temperature thermal reservoir and delivers W,
net= 360 kJ of work
per cycle.
Write an expression for the efficiency of the engine.
What is this efficiency?
n =
Write an expression for the amount of energy required to be rejected into the low temperature reservoir.
How much energy, in kilojoules, is rejected into the low temperature resevoir?
A heat engine working between 230.0°C and 520.0°C, takes in 1.401 x 107 J of heat and delivers 4.100 x 106 J of work per cycle. What is its efficiency? What is the maximum possible efficiency of an engine working between these two temperatures?
Chapter 21 Solutions
Physics for Scientists and Engineers: A Strategic Approach, Vol. 1 (Chs 1-21) (4th Edition)
Ch. 21 - Prob. 1CQCh. 21 - Rank in order, from largest to smallest, the...Ch. 21 - Prob. 3CQCh. 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. 8CQCh. 21 - Prob. 9CQCh. 21 - Prob. 10CQ
Ch. 21 - Prob. 11CQCh. 21 - Prob. 1EAPCh. 21 - Prob. 2EAPCh. 21 - Prob. 3EAPCh. 21 - Prob. 4EAPCh. 21 - Prob. 5EAPCh. 21 - Prob. 6EAPCh. 21 - The power output of a car engine running at 2400...Ch. 21 - Prob. 8EAPCh. 21 - Prob. 9EAPCh. 21 - Prob. 10EAPCh. 21 - Prob. 11EAPCh. 21 - Prob. 12EAPCh. 21 - Prob. 13EAPCh. 21 - Prob. 14EAPCh. 21 - Prob. 15EAPCh. 21 - Prob. 16EAPCh. 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. 19EAPCh. 21 - Prob. 20EAPCh. 21 - Prob. 21EAPCh. 21 - Prob. 22EAPCh. 21 - Prob. 23EAPCh. 21 - Prob. 24EAPCh. 21 - Prob. 25EAPCh. 21 - Prob. 26EAPCh. 21 - Prob. 27EAPCh. 21 - A Carnot engine whose hot-reservoir temperature is...Ch. 21 - Prob. 29EAPCh. 21 - A heat engine operating between energy reservoirs...Ch. 21 - Prob. 31EAPCh. 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. 35EAPCh. 21 - Prob. 36EAPCh. 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. 39EAPCh. 21 - Prob. 40EAPCh. 21 - An ideal refrigerator utilizes a Carnot cycle...Ch. 21 - Prob. 42EAPCh. 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. 46EAPCh. 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. 50EAPCh. 21 - Prob. 51EAPCh. 21 - Prob. 52EAPCh. 21 - Prob. 53EAPCh. 21 - Prob. 54EAPCh. 21 - Prob. 55EAPCh. 21 - Prob. 56EAPCh. 21 - Prob. 57EAPCh. 21 - A heat engine using a monatomic gas follows the...Ch. 21 - Prob. 59EAPCh. 21 - Prob. 60EAPCh. 21 - Prob. 61EAPCh. 21 - Prob. 62EAPCh. 21 - Prob. 63EAPCh. 21 - Prob. 64EAPCh. 21 - Prob. 65EAPCh. 21 - Prob. 66EAPCh. 21 - Prob. 67EAPCh. 21 - Prob. 68EAPCh. 21 - Prob. 69EAPCh. 21 - Prob. 70EAPCh. 21 - A refrigerator using helium gas operates on the...Ch. 21 - Prob. 72EAPCh. 21 - The gasoline engine in your car can be modeled as...Ch. 21 - Prob. 74EAP
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