2007-01-23 08:07:15 · 6 answers · asked by Black S 1 in Environment
the liquid nitrogen answer would work but that isn't what you mean, I don't think, because it wouldn't dissolve in the water, and would just quicken the effect of freezing because it is cold itself.
Anything that is soluble that you add to water would lower the freezing point (and raise the melting point of the ice). I don't think there is anything you can dissolve in water to make it freeze at a higher temperature. By the way warm water DOES freeze faster, as was pointed out by one of the earlier answerers (is it because the water gets cold more quickly due to evaporation from it's surface??).
I wonder....if you put a mass of metal into a bucket of water so that part sticks out is it possible that the metal would radiate heat more quickly than the water itself? If it did, then the heat in the water would naturally flow to the metal and be radiated more quickly than without the metal. (This is really not a lot different than the nitrogen answer). I remember seeing ice form on objects in the water of a pond before the surface itself froze, and never really considered why.
2007-01-23 10:12:24 · answer #1 · answered by David A 5 · 0⤊ 0⤋
Salt. It makes the temp fall quicker.
2007-01-23 16:14:19 · answer #2 · answered by Marvinator 7 · 0⤊ 0⤋
Dry ice or liquid nitrogen...
But you can't just dissolve something in water. Doing that would actually make it freeze more slowly.
2007-01-23 16:13:01 · answer #3 · answered by hcbiochem 7 · 0⤊ 0⤋
salt but am not sure if it makes it melts quicker or freeze quicker
2007-01-23 16:18:00 · answer #4 · answered by jomo7125 3 · 0⤊ 0⤋
Hot water freezes faster than cold water! Go figure. ;)
2007-01-23 16:17:13 · answer #5 · answered by Anonymous · 0⤊ 0⤋
Ice cubes:)
2007-01-23 16:11:01 · answer #6 · answered by Anonymous · 0⤊ 0⤋