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Author Question: The compressor in a certain Carnot refrigerator performs 480 J of work to remove 150 J of heat from ... (Read 87 times)

skymedlock

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on: Jul 29, 2018
The compressor in a certain Carnot refrigerator performs 480 J of work to remove 150 J of heat from the interior of the refrigerator. How much heat must the coils behind the refrigerator discharge into the kitchen?
 
  A) 110 J
  B) 150 J
  C) 330 J
  D) 480 J
  E) 630 J

Question 2

A 2.0-kg block of aluminum at 50C is dropped into 5.0 kg of water at 20C and the temperature is allowed to stabilize.
 
  What is the total change in entropy during this process, assuming no heat is exchanged with the environment? The specific heat of aluminum is 910 J/(kgK) and the specific heat of water is 4190 J/(kgK). A) 8.2 J/K
  B) 10 J/K
  C) 3.3  10-2 J/K
  D) 3.8  10-3 J/K
  E) 2.4  10-3 J/K


dmurph1496

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Reply #1 on: Jul 29, 2018
Answer to Question 1

This is awesome you took your the time to answer these questions. You have been so helpful.

Answer to Question 2

A


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