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Topic: amount of heat given off to freeze water?  (Read 1974 times)

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Offline tweedledee

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amount of heat given off to freeze water?
« on: February 13, 2012, 07:26:09 PM »
If it takes 500 joules of heat to melt an ice cube, how much heat would be given off to re-freeze the water?

Offline XGen

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Re: amount of heat given off to freeze water?
« Reply #1 on: February 13, 2012, 07:48:20 PM »
What is your train of thought? Do you have any idea what this kind of phase change, and the heat difference associated with it, is called?

Offline Arkcon

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Re: amount of heat given off to freeze water?
« Reply #2 on: February 13, 2012, 08:14:53 PM »
It either takes more, less, or exactly the same amount of energy.  Yeah, I know, that sounds dumb of me to mention. ;D  But if it took more or less, wouldn't that be really useful?  As a free source of energy?  Ever hear of any of those, in real life?
Hey, I'm not judging.  I just like to shoot straight.  I'm a man of science.

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