Water?? it expands when frozen....What happens to water when it cant expand? Can we harness this energy? Water?
by 
Anonymous
ANSWERS: 4
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The energy required to move the water to the location where it would freeze would be more than what is gained.
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Water is well known for rupturing metal pipes as it expands during freezing. Some of that work could be harnessed by clever engineering. But how are you going to freeze water? Run a compressor? If it takes energy to lower the temperature then you'll never come close to getting out of it what you put into it. You could move the water-filled device to a colder region (polar, high-altitude, etc.) but now you've expended energy another way.
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But...What happens to it. evaporate, never change?
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If the water can't expand, then its freezing temperature will be depressed. This simply means that the temperature at which if freeze will be lower and the solid form will occupy the volume available. One thing that most people don't realize is that solids will contract (occupy less space) as the temperature decreases. For whatever, the volume of the liquid state is, there is a temperature at which the solid will occupy the same volume. When the temperature gets down to that point, then the water will freeze.
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