Consider the following idealized heat engine:|ThQn WoutQ. ]T.Here, the box labeled Tħ corresponds to a thermal reservoir at temperature Th, the boxlabeled Tc is also a thermal reservoir at a lower temperature Tc< Th. During one cycle of theengine, an amount of heat Qn flows from the hot thermal reservoir, the engine does apositive amount of work Wout and an amount of heat Qc flows into the cold thermalreservoir. (With this convention, Qh, Qc, and Wout are all positive quantities.)Calculate the following quantities.Give your answers in terms of Qh, Th, and Tc. (Advice: be careful of your signs.)1. Qc+ Wout2. The entropy change of the hot thermal reservoir.3. Assume that no work is done (Wout = 0). What is the entropy change of the totalengine + reservoir system?4. What is the maximum work Woutmax that can be extracted from this engine? Brieflydiscuss the origin of this limitation.

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Consider the following idealized heat engine:| I'n W out Q.

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

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Consider the following idealized heat engine:|
Th
Qn Wout
Q. ]
T.
Here, the box labeled Tħ corresponds to a thermal reservoir at temperature Th, the box
labeled Tc is also a thermal reservoir at a lower temperature Tc< Th. During one cycle of the
engine, an amount of heat Qn flows from the hot thermal reservoir, the engine does a
positive amount of work Wout and an amount of heat Qc flows into the cold thermal
reservoir. (With this convention, Qh, Qc, and Wout are all positive quantities.)
Calculate the following quantities.
Give your answers in terms of Qh, Th, and Tc. (Advice: be careful of your signs.)
1. Qc+ Wout
2. The entropy change of the hot thermal reservoir.
3. Assume that no work is done (Wout = 0). What is the entropy change of the total
engine + reservoir system?
4. What is the maximum work Woutmax that can be extracted from this engine? Briefly
discuss the origin of this limitation.

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