Which is faster to become the ice from water and hot water with same cooling condition ?

Question

Which is faster to become the ice from water and hot water with same cooling condition ?

Answer 1

It depends on the conditions of the experiment.  Cold water freezes faster than an equal quantity of hot water.   But you don't always end up with equal quantities due to evaporation.  Also, such factors as dissolved gas and convection play an important role.  Read the article below on the Mpemba effect.