Problem 18.58 To keep a room at a comfortable 22.0?C , a Carnot heat pump does 3

Question

Problem 18.58

To keep a room at a comfortable 22.0?C , a Carnot heat pump does 325J of work and supplies it with 3240J of heat.

Part A

How much heat is removed from the outside air by the heat pump?

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Part B

What is the temperature of the outside air?

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Problem 18.58

To keep a room at a comfortable 22.0?C , a Carnot heat pump does 325J of work and supplies it with 3240J of heat.

Part A

How much heat is removed from the outside air by the heat pump?

Qc = J

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Part B

What is the temperature of the outside air?

Tc = K

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Explanation / Answer

Heat removed= 3240-325=2915 J

(Qc/Qh)=(Tc/Th) should work. Make sure you convert 22 degrees Celsius to Kelvin though before you plug in the numbers

Tc=(2915J/3240J)(22+273)
Tc=265.40 degrees Kelvin
= -7.6 degrees Celsius

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