Thermodynamics Question 368

Question: An ideal refrigerator has a freezer at a temperature of 13C. The coefficient of performance of the engine is 5. The temperature of the air (to which heat is rejected) will be

Options:

A) 325°C

B) 325K

C) 39°C

D) 320°C

Show Answer

Answer:

Correct Answer: C

Solution:

[c]Coefficient of performance K=T2T1T2

Therefore 5=(27313)T1(27313)=260T1260

Therefore 5T11300=260

Therefore 5T1=1560

Therefore T1=312K39C



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