Question

why does hot water freeze faster than cold water

Answer 1

warm waterevaporates rapidly and since this is an endothermic process, it cools thewater making it freeze more quickly.

Answer 2

$\underline \bold{Answer:-}$

If we will have an equal amount of hot and cold tap water and when we will place them in a freezer then the cold water will freeze faster.

This is first observed by a scientist named as Mpemba. On his name this effect is named as the Mpemba's effect. This is his observation defined below.

Mpemba's effect says that the warm water freezes more quickly than the cold water.

He has given his explanation as there is a better thermal contact between the refrigerator and the hot container than the thermal contact between the refrigerator and the cold container.

There are many more explanation given by the other scientist also but the above one is the most common.

The more explanation are as follows:-

1) In warm water the hydrogen bonding is beaker.

2) Evaporation take place in hot water and reduces it's mass so as it can cool faster.