2006-07-20 07:02:27 · 6 answers · asked by tatesvader 1 in Science & Mathematics ➔ Earth Sciences & Geology
There are three things that change the freezing point (and boiling point).
1. Pressure. By increasing the pressure, water will freeze at lower temperatures (because it expands when frozen). See link for pure water phase diagram.
2. Solution. Anything dissolved in water will change the critical values of freezing and boiling. This includes gases.
3. Lack of Contact. When water is just below 32 F, it will not always freeze becaue it needs something to freeze on. It takes lower temperatures to freeze on itself. That's why supercooled water will freeze on impact. This is known as freezing rain.
2006-07-20 07:52:57 · answer #1 · answered by QFL 24-7 6 · 1⤊ 0⤋
it can, because although water starts freezing at 32 degrees F, it does not completely freeze for about 5 minutes and the tempurature would have to be about 25 degrees F for more than the surface of the water to freeze, that is why the avereage freezer temparature is about 20 degrees farenheit
2006-07-20 14:07:46 · answer #2 · answered by Leon K. 3 · 0⤊ 0⤋
yes but it depends on how deep the water is and how long it stays at 32 degrees or below
2006-07-20 16:13:45 · answer #3 · answered by Cuz 1 · 0⤊ 0⤋
As salt level increases in fresh water, the freezing point will decrease. For pure water, freezing point is 32F.
2006-07-20 14:08:07 · answer #4 · answered by galactic_man_of_leisure 4 · 0⤊ 0⤋
Yes its a phenomenon called super cooling. I can't really give a great explanation for it but if you google supercooling it should give you some good stuff.
2006-07-20 14:17:46 · answer #5 · answered by Jake S 5 · 0⤊ 0⤋
Yes, it you change the pressure significantly (I can't recall if it has to raise or lower).
2006-07-20 14:06:33 · answer #6 · answered by Icy U 5 · 0⤊ 0⤋