Basic Energy Question- Hot and Cold Water

AI Thread Summary
The discussion centers on the Mpemba effect, which suggests that hot water can freeze faster than cold water under certain conditions, though the reasons remain unclear and debated. Participants note that the effect is not consistently observed and depends on specific, poorly defined circumstances. The conversation also touches on the various ice structures that can form when water freezes, highlighting that different structures may influence the freezing process. Additionally, the phenomenon of supercooled water freezing into an amorphous solid is mentioned, suggesting it may require less energy to freeze in that state. Overall, the complexities of water's freezing behavior and the Mpemba effect remain intriguing yet unresolved topics in science.
Jshua Monkoe
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Why actually does "hot" water freeze before cold water? This sounds very basic but believe me I can't come up with a single feasible reason
 
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You refer to teh so called Mpemba effect. The jury is still out on this one. Even if it happens it happens only sometimes, when some particular (and not well defined) conditions are meet.
 
Borek said:
You refer to teh so called Mpemba effect. The jury is still out on this one. Even if it happens it happens only sometimes, when some particular (and not well defined) conditions are meet.

Mmh, interesting.
Just looked up the Mpemba effect.
Weird thing, there seems to be something missing in the wiki article.

I know that water freezing can result in different ice structures (15 types).
It would make a difference which ice structure water freezes in.
When super cooled water freezes "wild" - no structure (amorphous solid water or ASW).
This is how water occurs on other planets and moons.
I imagine it takes less (loss of) energy to freeze that way.
 
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