Can water be boiled at zero degree celcius? If yes, How?
925123
if the water is at very very low pressure it can become gaseous.\n\nSee also - the triple point of water
363447
this re minds me of a kind of heat called latent heat.this is the heat a subtance requires to change it state without changing it temperature,so water changes from liquid to steam at the same temperatutre if it assumes it latent heat of vapourization.thus water could be liquid at 100*c and also steam at the same temperature.
304917
I believe that you mean water boiling at a lower-than-normal temperature when the atmospheric pressure is lower, such as at high altitudes........if this is what you meant, water boils when the 'vapor pressure' of the water, which is the amount of liquid water which evaporates into the air and which rises with temperature, becomes equal to the atmospheric pressure.  If you are in Colorado, for example, there is just less air to push against the top of the water, so it will boil off with less heat to push it out.
253095
Did you try boiling water?
734492
Heat = mass x specific heat of material x change of temperature.\nSpecific heat of water is 1. So the amount of heat needed to be added is the mass of the water x the amount of change needed to get to boiling. So cold water does not boil faster. \n\nsalt will cause it to take longer. \n\nPeople think that tea tastes betterr if you start with cold water, which holds more oxygen. As you heat the water, the oxygen comes out. This may look like boiling.
795407
Of course it does.  If your water is at 99C, it will boil a lot faster than if you heat it from a 4C temperature.\nSame is true fro the freezing part; although variations would depend on the presence of an open or closed container, as evaporative cooling will take place is water is allowed to escape.
606548
Absolute zero.  There are ways to keep water from freezing using pressure, motion, impurities, and so forth.
64882
Water's boiling point is 100 degrees Celcious (212 Fahrenheit), at zero altitude. Altitude can change the boiling point for water.\n\nYou can calculate that if you know your altitude, by following the link provided below.
489650
No. Hot water will boil quicker because it is closer to water's boiling point. At sea level the bp of water is 100 C. (The boiling point is a little less at higher elevations). Once it gets heated to that it doesn't get hotter but rather it changes to a vapor. Cold water requires more energy over a longer period of time to heat it to the required temperature to reach its boiling point.
213381
Boiling the water for 5 minutes will kill bacteria and such, but the suspended particles will remain in the pot. You would have to collect the steam, and cool it down to condense it back in pure water, only containing H2O.
213133
The cooler water will freeze faster.  The hotter water is the faster the molecules in it are moving and the more energy there is in the water.  Before water can freeze it needs to lose this energy.  Therefore the more energy it needs to lose the longer it takes to cool and the longer it takes to freeze.\n\nThe belief the boiling water freezes faster than cooler water is a popular misconception.\n\nHowever, it is true to say that boiling water (100 degrees C) will freeze slightly faster then almost boiling water (95 degrees c) but that's because considerably more of the boiling wtare will evaporate than the nearly boiling water and therefore there's less water remaining.\n\nThis probably explains why cyanne2ak is able to freak people out by throwing hot coffee at them - in very cold temps theere will be very rapid evapouration and as such far less of the coffee that leaves the cup will land on the 'victim' then would be the case with tap water.
150195
at sea level water boils at 100 deg C\nat elevation like up a mountain it will boil at a lower temp because the pressure is lower. I think water boils at about 70 deg C on everest.
431610
putting you hand in boiling water
797128
How long? That depends on the pressue, how warm/cold the water already is, and what you're trying to boil it with.
877176
No, you can't burn because there is no air. Burning is an oxidation reaction.\n\nHowever, liquid water in a vacuum will immediately begin to boil, which will cool it off. If there is enough water it will soon be boiling and freezing at the same time. I have seen this myself, at the Exploratorium -- a science museum in San Francisco.
863405
To get the water in a microwave to go above 100C, you need to prevent it from boiling. The process of boiling takes up the heat required to raise its temperature.\n\nTo do this, you need distilled or deionized water (removing impurities/particles makes it harder for water to boil). When you microwave the water, it is possible to get it past 100C without causing the water to boil.\n\nBe careful when you do this however, the slightest agitation to the superheated water will cause it to EXPLODE and scald whatever it touches.
174433
273K = 0 degrees celsius therefore water freezes\n\nre jackster: freezing point and melting point are the same\nre kay: absolute zero is 0K at which all particles stop moving .. 273K is not absolute zero