why hot or warm water get frozen faster that norm temprtuer water?

Answer 1

There are a handful of experiments that have managed to show that warmer water can, under certain specific, but currently unknown conditions, sometimes freeze very slightly faster than water which was cooler than the warm water to begin with.

However, if you take a tray of cold tap water and a tray of hot tap water, and put them both in the freezer, the cold water will freeze faster every time.

It's elemetary physics. Hot water has more heat energy to get rid of to reach freezing temperature. That takes longer. Simple as that.

Answer 2

I don't know if that is completely true. Have you actually tried it. Have you taken to containers of the same type and with the same amount of water. Put hot water in one and ambient temp water in the other one. Put them in the fridge and see which one turns into ice first. I think the ambient one will turn to ice first because it is closest to the freezing point.

The explanation that I have heard is that the molecules in hot water are moving around faster. Because of this there is more interaction with the molecules thus a faster loss of heat. However, I think once the warm water gets to ambient temperature the rate of heat lost will be slowed down. I think the same explanation applies. The molecules of ambient water as not as excited than warm or hot water so the interaction is less. So, I think that yes, hot water loses heat faster but the heat loss will slow down once it get to low temperature. While this is happening the ambient temperature water should had loss some heat so it would be colder. This is why i think the lower temperature will get there first.

Well, thats what I think. I have not actually done the experiment to confirm my beliefs.

Answer 3

The steam goes up into the cold air and becomes colder and denser. It will fall back into the water and settle at the bottom which cools all the water faster.

Answer 4

Heating water eliminates all the dissolved air, and that allows for faster freezing.

Answer 5

Hot water can in fact freeze faster than cold water for a wide range of experimental conditions. This phenomenon is extremely counter- intuitive, and surprising even to most scientists, but it is in fact real.

see website... it is interesting

Answer 6

They don't

Just take 2 same sized plastic containers, add 2 oz of water to each, one hot and one room temp.; place on same shelf in freezer. Check back every 10 minutes.

Why does this question keep showing up on Yahoo Answers?

Who is telling you people this misinformation.

http://physicsweb.org/articles/world/19/4/4/1

Answer 7

If you read this link, this guy explains that the answer is true & false. It depends on how hot the hot water is. You need to read the whole page at this link:

Answer 8

this question is some kind of urban myth. the simple fact is, hot water will not freeze faster than cold water. try it at home and prove it for your self once and for all.

Answer 9

Evaporation leaves a smaller volume of water to freeze...

Answer 10

Boiling water will freeze faster because it is already evaporating.