THE PRACTICE STUDIO
Go slowly. Ask why. Make it yours.
PRACTICE / Refrigerators
Account for the work as well as cooling
A refrigerator has coefficient of performance Qc/W = 3.0 and receives 200 J of work per cycle.
How much heat does it reject to the hot surroundings per cycle?
Organize the givens & assumptions
- COPR = 3.0
- Work input W = 200 J per cycle
Steady cyclic operation with no net internal-energy change; positive magnitudes for heat transfers and work input.
- A
- B
- C
- D
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