Friday, July 4, 2014

Why does hot water freezes faster than cold water?

           Why does hot water freezes faster than cold water?

If we keep the cans of hot water and cold water , both in freezer , the can of hot water freezes faster then cold water.
The can of hot water undergoes endothermic reaction i.e. evaporation. As a molecule of water evaporates, it leaves the surface of water and flies to atmosphere.
This means that there is less amount of water left, to get freeze since most of it evaporates. Because of this, compared to the can of cold water which is kept to freeze, there is less water now in hot water can. Hence, it will freeze fast.