Quote:
Originally Posted by Tolouse
i remember someone in middle school (back in the early 90's) someone did do this as a science experiment
i never quite got the concept on how it worked though, and still find myself wondering how the molecules bond when they are just moving at such a fast speed whereas the cooler molecules are slower thus should be able to bond a lot quicker
maybe i'm just thinking too much about it, but since middle school, i have used hot water in my ice trays more than cold water
and everyone just thinks i am weird even after i tell them that hot water freezes faster than cold water
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Yeah, if you just think about it in terms of temperature then it doesn't make any sense. I think that's why people have trouble believing it. But, there is a lot more than just temperature as a single property of the water. There is how much gas is dissolved in the water. There are convection currents distributing the water differently between the two. The colder one may form a thin layer of ice on its surface preventing further evaporation while the hotter one continues to evaporate until it gets far colder. There are so many variables. That's why I think it's a good science fair project. All those graphs and controls - not to mention; it's unbelievable and therefore interesting.
-modest
