Why Does Hot Water Freeze Faster Than Cold Water?
Written (Chinese) by Ye Sen
Translated (English) by Ye Er
When hot water is put into the refrigerator or similar appliance, its massive heat dissipation plays a defrosting effect on its surrounding environment, which creates the advantage for the later cooling.
Water is the poor conductor of heat. The water near the wall of the container (side water) cools down first, its temperature gets low when the water in the center of the container (center water) keeps the original temperature. The temperature difference between side water and center water is more significant in “hot water” than in “cold water”. The temperature difference remains until the water completely freezes. This helps “hot water” on heat flow and heat transfer.