It doesn't seem to matter to me how fast the water evaporated. How you reach the freezing point becomes irrelevant. The point is that the crystallisation temperature is maintained for a MUCH shorter time with the hot water. To me this seems most likely to correlate to the dissolved gas thoerem.
If the idiot allowed the water to evaporate to a point where the volumes differ then its simply like comparing apples and oranges. Of course the water with the lower volume will freeze faster! That is common sense.
From what I gather sealed tube experiments cool faster too. In this evaporation, your largest variable in any liquid cooling curve, is not a factor.
In any scientific experiment, EVERYTHING must be maintained constant while one variable is changed. In this case the size and shape of the containers must be exactly the same. They should be sealed and suspended in the refridgerator to prevent ice-layer contact (with the shelf) and subsequent melting.
That's how I would do it anyway. I beleive it. I just don't accept sloppy scientific methods....
Try your own experiment morbo. Just don't blow anything up! <img src="/ubbthreads/images/graemlins/biggrin.gif" alt="" />
