To make ice, a freezer that is a reverse Carnot engine extracts 42 kJ as heat at -15 C during each cycle, with coefficient of performance 5.7. The room temperature is 30.3 C. How much (a) energy per cycle is delivered as heat to the room and (b) work per cycle is required to run the freezer?

To make ice, a freezer that is a reverse Carnot engine extracts 42 kJ as heat at -15 C during each cycle, with coefficient of performance 5.7. The room temperature is 30.3 C. How much (a) energy per cycle is delivered as heat to the room and (b) work per cycle is required to run the freezer?

University Physics Volume 2

18th Edition

ISBN:9781938168161

Author:OpenStax

Publisher:OpenStax

Chapter4: The Second Law Of Thermodynamics

Section: Chapter Questions

Problem 31P: If a refrigerator discards 80 J of heat per cycle and its coefficient of performance is 6.0, what...

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Question

To make ice, a freezer that is a reverse Carnot engine extracts
42 kJ as heat at -15 C during each cycle, with coefficient of
performance 5.7. The room temperature is 30.3 C. How much
(a) energy per cycle is delivered as heat to the room and (b) work
per cycle is required to run the freezer?

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