Explanation Formula Used: Thermal efficiency " η " of a heat engine is given as η = W o r k D o n e T o t a l u s e d e n e r g y × 100 % eq(1) Also applying conservation of energy Total heat used ( Q ) = Work done( W ) + Energy released ( U ) eq(2) Energy released is wasted energy to cold reservoir. Q is heat extracted from the hot reservoir. Calculation: (a) Heat extracted from the hot reservoir is 55kJ Heat wasted to cold reservoir is 40 kJ Using eq (2) we can find the work done by the engine

1st Edition

ISBN: 9781323834831

Author: Knight

Publisher: PEARSON C

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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…

Question

Chapter 21, Problem 3EAP

To determine

A heat engine extracts 55 kJ of work from hot reservoir. Each cycle exhaust 40kJ of work. We have to find the

(a) efficiency and

(b) work done by the engine.

Expert Solution & Answer

Chapter 21 Solutions

PHYS 212 FOR SCI+ENG W/MAST PHYS >ICP<

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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