Pure water freezes at precisely 0 degrees Celsius (Centigrade).
The Celsius scale takes the freezing point of pure water as 0 and the boiling point of pure water as 100.
If there are impurities the freezing point can be lower (sometimes higher). Salt water is a common example and freezes at a few degrees below zero - the more salt the lower the freezing point.
Air pressure, which constantly changes, alse affects the freezing point.
2007-02-10 08:47:13
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answer #1
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answered by Trevor 7
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Pure water at 1 atmosphere of pressure feezes at 32 degrees F or 0 deg C.
However, dissolved solids would decrease the temperature that water would normally freeze at. For example, a 10% salt solution will not freeze until 20 deg F.
Finally, pressure comes into play. You can lower the pressure to 1% of normal and water will then freeze just ever so slightly above 32 deg F. Or if you increase the pressure, the temperature required to freeze will go down. Most people get this backwards and think logically that water will freeze easier if pressure is added. But, if you remember that ice expands as it freezes, then anything that limits the expansion will limit the ability of ice to freeze. Therefore, higher pressures require colder temperatures to freeze.
2007-02-10 08:57:20
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answer #2
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answered by bkc99xx 6
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Water freezes at 32 degrees Fahrenheit and 0 degrees Celsius. Two different temperature scales but same temperature.
2007-02-10 09:50:06
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answer #3
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answered by Smiley 2
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0 C, 32 F
2007-02-10 07:33:56
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answer #4
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answered by Adam R 2
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32 degrees F or 0 degrees C
2007-02-10 16:33:36
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answer #5
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answered by Justin 6
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Water can freeze at 0°C but it can remain liquid down to -40°. Liquid water with a temperature below 0°C is called supercooled. It is common in clouds.
2007-02-10 08:06:42
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answer #6
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answered by tentofield 7
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0 degrees C, and 32 degrees F
2007-02-10 07:38:54
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answer #7
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answered by Meagan P 3
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0 celsius
32 Fehrenheite
2007-02-10 07:41:54
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answer #8
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answered by L 2
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32° F or 0° C...
2007-02-10 07:42:28
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answer #9
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answered by Flappy 3
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32 degrees Fahrenheit which is equal to 0 degrees Celsius. These two temperatures are equal.
2007-02-10 07:40:33
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answer #10
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answered by Anonymous
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