Does hot water freeze before cold?

Question

I wanted to do this as a science experiemnt with my students and could not find it as an experiement anywhere.

Answer 1

Water that has been recently boiled has driven off the dissolved gases contained in itself, so it will freeze more readily than water that has not been boiled recently.

Answer 2

A substance, hot water in this case has to lose heat to become cool.After it has become cooled there is a futher lost of heat for it to become cold & then freeze. Cold water is closer to the freezing point than hot water.Hence we may reason this from a logical perspective that cold water freezes before hot water

Answer 3

Good Day
Take your class out side and try a experiment. One small container with hot water and one of the same size container with cold water. While you are at it try another experiment. A piece of black material an a piece of white . Place them on snow and see which material the snow melts under first. This will show that black material are hotter than white.

Answer 4

Look up the "Mpemba Effect".

Answer 5

Thanks for asking that question and to the answer I must say I have learned something here.

I have heard this for many years and didn't bother to even think about it. Now I have so thanks.

Answer 6

http://math.ucr.edu/home/baez/physics/General/hot_water.html