posted by maria .
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?
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.