2006-09-30 06:30:51 · 14 answers · asked by Bella 1 in Environment
Freezing is a state change in matter (some examples are from a gas to a liquid, a liquid to a solid or from a solid to a gas). State change depends on two factors: temperature and pressure. At standard atmospheric pressure, water would have to be cooled before it could start to freeze (go solid). Less energy would have to be extracted from colder water than from hotter water before it reached 0 degrees C and could start to freeze. Therefore, given other equal conditions, cold water should start to freeze sooner than hot water.
2006-09-30 06:42:37 · answer #1 · answered by 13caesars 4 · 1⤊ 0⤋
Why so much umming and erring? Surely it should be very easy to test. Heat some water (how hot, 40oC, 100oC?, put it in the freezer. Take some cold water (how cold? 5oC, 3oC?), put it in the freezer at the same time. Check at regular intervals whether either have turned to solid.
I can't see any reason why hot water could possibly freeze faster than cold water. I would have thought that the more temperature it has to lose (to get to 0oC), then the quicker it will chill, but the rate of temperature reduction will slow down as the temperature becomes lower. So effectively, if cold water is only a few degees from 0, it will freeze faster.
Of course, if you put hot water in the freezer, it will melt (heat up) the ice and air around it. This will obviously slow down the chilling process.
Why do you ask this question which goes against logic?
2006-10-03 04:04:05 · answer #2 · answered by ardat_lilitu_666 1 · 0⤊ 0⤋
It depends on what you mean by 'quicker'. If you are referring to the elapsed time between initial water temperature to the freezing point of water, no it will not freeze faster, they will freeze at the same time. (Given all variables the same except water temperature)
If you mean 'quicker' in the sense of rate of change from initial temperature to freezing point then yes, the rate of change from hot water is greater than that of cold water.
This has to do with the amount of kinetic energy stored in the water as compared to the amount of energy in the ambient environment. When water freezes it must give off enough energy to reach its solid state. Because of entropy energy will try to reach the lowest possible state in a given environment. Because Hot water must release much more energy to get to its solid state while cold water must release much less.
2006-09-30 06:47:31 · answer #3 · answered by zatcsu 2 · 0⤊ 0⤋
I think it does. Along time ago someone told me to make ice cubes with hot water. They will freeze faster.
2006-09-30 15:14:35 · answer #4 · answered by mabell1025 3 · 0⤊ 0⤋
This has been studied a lot. When I was at university 35 years ago some of my friends were doing experiments on it and they still haven't decided so you asked a very good question. Try the article in wikipedia given below.....
2006-10-01 10:34:12 · answer #5 · answered by philjtoh 2 · 0⤊ 0⤋
yes...water that has been boiled first and then frozen will freeze quicker than cold water.
2006-09-30 06:36:39 · answer #6 · answered by Yvette S 1 · 0⤊ 0⤋
no and if you make ice cubes from hot water they will crack and break up so use cold
2006-09-30 06:37:30 · answer #7 · answered by Anonymous · 0⤊ 0⤋
its a question we have all pondered in those lonely times lying in bed unable to sleep.
i say maybe
hope that helped
love
Oz
2006-09-30 07:05:48 · answer #8 · answered by ozzysheeplover 3 · 0⤊ 0⤋
yes
2006-09-30 06:38:51 · answer #9 · answered by peaches 1 · 0⤊ 0⤋
No it will take longer
2006-09-30 06:44:33 · answer #10 · answered by JJ 7 · 0⤊ 0⤋