# physics

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A Carnot refrigerator is operating between thermal reservoirs with temperatures of 27.9°C and 0.0°C.

a) How much work will need to be input to extract 13.7 J of heat from the colder reservoir?

b) How much work will be needed if the colder reservoir is at -15.7°C?

• physics -

Convert temperatures to kelvin and apply the Carnot efficiency formula.
Work(out)/Heat(in) = 1 - (Tcold/Thot)

Help will be provided when effort is demonstrated.

• physics -

-0.0988

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