Please help meout!! PHYSICS-Examination 6-Contined 27. (A) Where does the heat g

Question

Please help meout!!

PHYSICS-Examination 6-Contined 27. (A) Where does the heat go that is given off by the condensation coils of the refrigerator i your kitchen? (B) On a hot day, it is 90 in your friend Eustace's kitchen. Eustace decides to close all the doors and windows so no further heat transfer occurs between the outdoors and his apartment, and then he opens his refrigerator. If Eustace leaves the refrigerator open all day, will it cool down the kitchen? Why or why not? Describe the Blow of heat in the room after the refrigerator door is opened.

Explanation / Answer

A) The heat given off by the condensation coils joined by the heat produced by the compressor motor (and any other electrical components outside the refrigerator and freezer) is discharged into the room. The coils must be kept cleared of dust (especially if located under the refrigerator) for efficient operation. If the refrigerator consumes a kilowatt-hour of electrical energy while operating when first plugged in, it will add more heat to a perfectly insulated room than a one kilowatt electric heater (because it includes heat removed from water to produce ice in the freezer or from food added to the refrigerator). If the unit is then shut off and the doors opened it will cool the room back down but not quite to its initial temperature because one kilowatt-hour of electrical energy was added to the room as heat.

Refrigerators always help heat a room in the winter but are an unavoidable heat load on an air-conditioning system in the summer.

B) Yes temporarily. Through the process of convection which is the rising of hot air. The cold air would hit the ground and the hot air would rise.

C) After 5 minutes the ot air that would be trapped in the fridge would eventually overpower the amount of cold air that the unit is providing thus rendering it almost useless
(although it will still give out some cold air)
D) If the refrigerator is unplugged the movement of the hot air would almost immediately overpower the output from the fridge so the room would heat up

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