Tipler6 19.P.050 1 2 A refrigerator is rated at 370 W What is the maximum amount

Question

Tipler6 19.P.050 1 2 A refrigerator is rated at 370 W What is the maximum amount of heat it can absorb from the food compartment in 1 min if the food- compartment temperature of the refrigerator is 0°C and it releases heat into a room at 20° C? Submit You currently have 0 submissions for this question. Only 10 submission are allowed. You can make 10 more submissions for this question. "If the COP of the refrigerator is 70 percent of that of a reversible refrigerator, how much heat can it absorb from the food compartment in 1 min under these conditions? Submit You currently have 0 submissions for this question. Only 10 submission are allowed You can make 10 more submissions for this question

Explanation / Answer

COP of refrigeration=amount of heat extracted/amount of work done

=cold temperature/(hot temperature-cold temperature)

=(273+0)/((273+20)-(273+0))

=13.65

given amount of work done=370 W=370 J/s

then amount of work done in 1 min=370*60=22200 J

then amount of heat that can be extracted=22200*13.65

=303030 J

part 2:

if COP is 70 percent of a reversible refrigerator, it can absorb 303030*0.7=212121 J

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