(III) A real heat engine working between heat reservoirs at970 K and 650 K produces 550 J of work per cycle for a heatinput of 2500 J. (a) Compare the efficiency of this real engineto that of an ideal (Carnot) engine. (b) Calculate the totalentropy change of the universe per cycle of the real engine,and (c) also if the engine is ideal (Carnot).

(III) A real heat engine working between heat reservoirs at970 K and 650 K produces 550 J of work per cycle for a heatinput of 2500 J. (a) Compare the efficiency of this real engineto that of an ideal (Carnot) engine. (b) Calculate the totalentropy change of the universe per cycle of the real engine,and (c) also if the engine is ideal (Carnot).

University Physics Volume 2

18th Edition

ISBN:9781938168161

Author:OpenStax

Publisher:OpenStax

Chapter4: The Second Law Of Thermodynamics

Section: Chapter Questions

Problem 82AP: A Carnot cycle working between 100 and 30 is used to drive a refrigerator between 10 and 30 ....

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(III) A real heat engine working between heat reservoirs at
970 K and 650 K produces 550 J of work per cycle for a heat
input of 2500 J. (a) Compare the efficiency of this real engine
to that of an ideal (Carnot) engine. (b) Calculate the total
entropy change of the universe per cycle of the real engine,
and (c) also if the engine is ideal (Carnot).

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