Question

Why does hot water freeze faster than cold water?

Answer 1

warm water evaporates rapidly and since this is an endothermic process, it cools the water making it freeze more quickly.

Answer 2

Answer:

Temperature dependency is responsible for the process that hot water freeze faster than cold water.

Explanation:

The effect given above is called Mpemba Effect. According to this idea hot water freezes more quickly as compared to cold water. But until now there is no convincing explanation for this strange phenomenon.  One idea is that hot containers make better thermal contact with a refrigerator and so conduct heat more efficiently because a good conductor is good fro the transfer of heat. Another idea about this effect is that warm water evaporates more quickly and since this is an endothermic process, it cools the water making it freeze more quickly.