A vessel containing 8.43 kg of water at 21.1C is put into a refrigerator. The 0.1655 hp motor runs for 9 min to cool the liquid to the refrigerator's low temperature 4C. What is the COP of the refrigerator? W=P(delta)t = 123.463Wx540s = 66670.02 J COP = Qc/W Please Help. Thank you.