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A refrigerator with a coefficient of performance of 1.75
Chapter 18, Problem 57P(choose chapter or problem)
Problem 57P
A refrigerator with a coefficient of performance of 1.75 absorbs 3.45 × 104 J of heat from the low-temperature reservoir during each cycle. (a) How much mechanical work is required to operate the refrigerator for a cycle? (b) How much heat does the refrigerator discard to the high-temperature reservoir during each cycle?
Questions & Answers
QUESTION:
Problem 57P
A refrigerator with a coefficient of performance of 1.75 absorbs 3.45 × 104 J of heat from the low-temperature reservoir during each cycle. (a) How much mechanical work is required to operate the refrigerator for a cycle? (b) How much heat does the refrigerator discard to the high-temperature reservoir during each cycle?
ANSWER:
Solution 57P
Step 1 of 3
Here, we have to calculate the amount of mechanical work needed for the working of a refrigerator and the heat energy exhausted to the hot reservoir.
The equation for the work done of a refrigerator,
--------------(1)
Where, - Heat taken from the cold reservoir
- Heat given off to the hot reservoir.
The equation for coefficient of performance of a refrigerator,
----------------(2)
a)