During each cycle of operation a refrigerator absorbs 51 cal from the freezer compartment and expels 84 cal to the room.If one cycle occurs every 10 s,how many minutes will it take to freeze 550 g of water,initially at 0°C? (L_v = 80 cal/g)

Question

Quizplus · Accepted Answer

To freeze 550 g of water at 0°C, we need to remove 550 g * 80 cal/g = 44,000 cal. The refrigerator removes 51 cal every 10 seconds, so it removes 51 cal * 6 = 306 cal per minute. Therefore, it will take 44,000 cal / 306 cal/min = 143.79 minutes, which rounds to 144 minutes.

During Each Cycle of Operation a Refrigerator Absorbs 51 Cal