SU-1 A heat engine with &=0.400 operates between two heat reservoirs at 250K and 450K. The energy amounts and heat flow diagram for one cycle of operation of the engine is shown to the right. a) What is the change in entropy for the engine for one cycle of operation of the engine? b) Find the change in entropy for the engine surroundings for one cycle of operation of the engine. c) Find the change in entropy for the universe for one cycle of operation of the engine. d) Is this engine real, reversible, or impossible? Explain why using your results from the previous parts. T-450K 500J 200J Engne 300JV T-250K

SU-1 A heat engine with &=0.400 operates between two heat reservoirs at 250K and 450K. The energy amounts and heat flow diagram for one cycle of operation of the engine is shown to the right. a) What is the change in entropy for the engine for one cycle of operation of the engine? b) Find the change in entropy for the engine surroundings for one cycle of operation of the engine. c) Find the change in entropy for the universe for one cycle of operation of the engine. d) Is this engine real, reversible, or impossible? Explain why using your results from the previous parts. T-450K 500J 200J Engne 300JV T-250K

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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Concept explainers

Work and Heat Transfer

It is generally related to thermal engineering which tells about the use, creation, conversion and transfer of heat energy between the systems. It is also considered that to transfer heat from one source to another, transfer of masses is also required. There are various mechanisms by which, transfer of heat takes place i.e. thermal conduction, convection, radiation or by change of phase. All these mechanisms have their own specific features which sometimes occur simultaneously within the same system.

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SU-1 A heat engine with &=0.400 operates between two heat reservoirs
at 250K and 450K. The energy amounts and heat flow diagram
for one cycle of operation of the engine is shown to the right.
a) What is the change in entropy for the engine for one
cycle of operation of the engine?
b) Find the change in entropy for the engine surroundings
for one cycle of operation of the engine.
c) Find the change in entropy for the universe for one cycle
of operation of the engine.
d) Is this engine real, reversible, or impossible? Explain why using your results from the previous parts.
Th-450K
500
200J
Engne
300J
T-250K

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