To make ice, a freezer that is a reverse Carnot engine extracts 42 kJ as heat at -15 °C during each cycle. The room temperature is 30.3 °C. (Cwater = 4187 J/kg·K) a) What is the unit's coefficient of performance? b) How much work per cycle is required to run the freezer? c) How much energy per cycle is delivered as heat to the room? (Halliday, Resnick, 201

University Physics Volume 2
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Chapter4: The Second Law Of Thermodynamics
Section: Chapter Questions
Problem 32P: A refrigerator has a coefficient of performance of 3.0. (a) If it requires 200 J of work per cycle,...
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To make ice, a freezer that is a reverse Carnot engine
extracts 42 kJ as heat at -15 °C during each cycle. The
room temperature is 30.3 °C. (water 4187 J/kg K)
a) What is the unit's coefficient of performance?
=
b) How much work per cycle is required to run the
freezer?
c)
How much energy per cycle is delivered as heat to
the room?
(Halliday, Resnick, 2014)
Transcribed Image Text:To make ice, a freezer that is a reverse Carnot engine extracts 42 kJ as heat at -15 °C during each cycle. The room temperature is 30.3 °C. (water 4187 J/kg K) a) What is the unit's coefficient of performance? = b) How much work per cycle is required to run the freezer? c) How much energy per cycle is delivered as heat to the room? (Halliday, Resnick, 2014)
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