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Why does Boiling water freeze faster than cold water.

 
Anonymous Coward
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12/25/2012 05:12 AM
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Why does Boiling water freeze faster than cold water.
Here is my simple PHYSICAL (Physics) explanation to whats happening.


Imagine Water molecules as cars , the faster the car drives when a car crashes into another car the greater the force exerted on the frame of the car therefore the quicker (FASTER) the cars slow down on impact.


Whereas slower cars that hit each other the energy is absorbed like a shock absorber and therefore provides a spring back effect.


Upon impact high speed cars or molecules suffer from a different type of stress on the bonds in a similar way a car frame would.



[link to www.youtube.com]






[link to www.youtube.com]

Anonymous Coward
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12/25/2012 05:15 AM
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Re: Why does Boiling water freeze faster than cold water.
The faster you move, the heavier you are.

Step on a scale.

Now, jump on it.

Inertia is a wonderful thing.
Anonymous Coward
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12/25/2012 05:16 AM
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Re: Why does Boiling water freeze faster than cold water.
boiling water evaporates, less water freezes faster than more water
ANHEDONIC

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12/25/2012 05:40 AM

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Re: Why does Boiling water freeze faster than cold water.
1.21 gigawatts

"You will not be punished for your anger, you will be punished by your anger"
Anonymous Coward
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12/25/2012 05:48 AM
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Re: Why does Boiling water freeze faster than cold water.
boiling water evaporates, less water freezes faster than more water
 Quoting: Anonymous Coward 29757648



iamwith
JUST HERE

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12/25/2012 05:49 AM

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Re: Why does Boiling water freeze faster than cold water.
chemical reaction
:glp sign:
The Scientist
Time flies but aeroplanes crash

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12/25/2012 06:06 AM

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Re: Why does Boiling water freeze faster than cold water.
[link to www.rsc.org]


Why does hot water freeze faster than cold water?


It seems a simple enough question - yet it has baffled the best brains for at least 2,300 years.

Aristotle agonized over it fruitlessly in the fourth century BC

Roger Bacon in the 13th century used it to advocate the scientific method in his book Opus Majus

Another Bacon, Francis, wrote in his 1620 Novum Organum, that "slightly tepid water freezes more easily than that which is utterly cold" but could not explain why

Descartes was defeated by it in the 17th century AD

Even perplexed 20th and 21st century scientists and intellectuals have swarmed over it without result
Anonymous Coward
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12/25/2012 06:15 AM
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Re: Why does Boiling water freeze faster than cold water.
The impurities in the water (microscopic particles of stuff that are not H2O) freeze before the freezing temperature of water is attained, thus leading the warmer water to form around the foreign particles and freeze faster.

If you use distilled water, instead of regular 'contaminated' water, the hot & cold controlled experiment will both freeze at the same velocity.

It isn't the water that is freezing first, it is the contaminants in the water that freeze, and the water then freezes 'around' them.


If you don't believe me, distill some water and perform the experiment yourself.

All you need is a kitchen equipped with a tap (faucet for you yanks), a kettle & a fridge.


Enjoy ... :)
The Scientist
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12/25/2012 06:23 AM

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Re: Why does Boiling water freeze faster than cold water.
A way to narrow down the possibilities is to carry out experiments on other liquids containing no water to see if the same phenomenon is seen.
Judethz
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12/25/2012 06:29 AM

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Re: Why does Boiling water freeze faster than cold water.
A way to narrow down the possibilities is to carry out experiments on other liquids containing no water to see if the same phenomenon is seen.
 Quoting: The Scientist


watter Try dehydrated water.
Anonymous Coward
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12/25/2012 06:29 AM
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Re: Why does Boiling water freeze faster than cold water.
A way to narrow down the possibilities is to carry out experiments on other liquids containing no water to see if the same phenomenon is seen.
 Quoting: The Scientist


Meth cooker spotted.
Anonymous Coward
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12/25/2012 06:37 AM
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Re: Why does Boiling water freeze faster than cold water.
So now that we know this what possible benefits can we gain from this?
Anonymous Coward
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12/25/2012 06:42 AM
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Re: Why does Boiling water freeze faster than cold water.
spock
Anonymous Coward
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12/25/2012 06:49 AM
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Re: Why does Boiling water freeze faster than cold water.
Anonymous Coward
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12/25/2012 06:50 AM
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Re: Why does Boiling water freeze faster than cold water.
I personally think it is because the hotter a liquid or gas is the more the molecules move around. Also when a liquid boils it causes the liquid to circulate inside of the container. Now the reason I think that causes the water to freeze faster is because of the amount of molecules that are directly touching the cold air as opposed to only the water on top getting direct contact and then cooling the other molecules below it. At least that is the only logical explanation I can think of.
Anonymous Coward
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12/25/2012 06:52 AM
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Re: Why does Boiling water freeze faster than cold water.
Why are vehicles cooling systems pressurized ?

Every PSI raises the boiling point by 7 degrees.

Now, you know.
Smith Jefferys

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12/25/2012 06:53 AM

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Re: Why does Boiling water freeze faster than cold water.
I've always assumed it was because the greater gradient in temperature change.

Sort of like the difference between rolling a ball down a steep hill and a steeper hill; same energies involved, but a faster process.
Enthalpy of Fusion
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12/25/2012 08:36 AM
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Re: Why does Boiling water freeze faster than cold water.
When liquid water is cooled, its temperature falls steadily until it drops just below the freezing point at 0 °C. The temperature then remains constant at the freezing point while the water crystallizes. Once the water is completely frozen, its temperature continues to fall.

This is why snow caves and igloos are warmer than a rock cave. As the water freezes, it gives off heat.
Anonymous Coward
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12/25/2012 09:20 AM
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Re: Why does Boiling water freeze faster than cold water.
Boiled water has all the dissolved gasses removed from solution. Thats why you see bubbles forming well before it actually boils. These removed gasses can no longer interfere with the formation of crystals...mystery solved and yes I am a scientist damn it.
Anonymous Coward
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12/25/2012 09:30 AM
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Re: Why does Boiling water freeze faster than cold water.
Boiled water has all the dissolved gasses removed from solution. Thats why you see bubbles forming well before it actually boils. These removed gasses can no longer interfere with the formation of crystals...mystery solved and yes I am a scientist damn it.
 Quoting: Anonymous Coward 4710911


My water never stops bubbling. I doubt that all the gas is removed.
Brad Daylight

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12/25/2012 09:34 AM
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Re: Why does Boiling water freeze faster than cold water.
The faster you move, the heavier you are.

Step on a scale.

Now, jump on it.

Inertia is a wonderful thing.
 Quoting: Anonymous Coward 17487177


you owe me a new scale and 2 new tiles to my bathroom floor
"I have felt despair many times in my life, but I do not keep a chair for it."
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Today is a gift, that is why it is called "The Present"

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Have a nice day, may God bless you :D
Anonymous Coward
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12/25/2012 09:35 AM
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Re: Why does Boiling water freeze faster than cold water.
Boiling water will never freeze.
The Dudester

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12/25/2012 09:46 AM

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Re: Why does Boiling water freeze faster than cold water.
Why are vehicles cooling systems pressurized ?

Every PSI raises the boiling point by 7 degrees.

Now, you know.
 Quoting: Anonymous Coward 17487177


Who are you AC? Cliff Clavin?
"Sometimes you eat the bar, and sometimes the bar, well it eats you."
Anonymous Coward
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12/25/2012 09:48 AM
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Re: Why does Boiling water freeze faster than cold water.
its simple really, conduction...
Anonymous Coward
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12/25/2012 09:54 AM
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Re: Why does Boiling water freeze faster than cold water.
i'll try to explain.

Heat acts as a catalyst for the reaction taking place, we know that, so my theory is that the heat energy in hot water is more easily conducted away from the water, speeding up the reaction.
Anonymous Coward
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12/25/2012 09:57 AM
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Re: Why does Boiling water freeze faster than cold water.
faster heat loss
Anonymous Coward
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12/25/2012 09:59 AM
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Re: Why does Boiling water freeze faster than cold water.
It's Christmas ffs...
Anonymous Coward
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12/25/2012 10:01 AM
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Re: Why does Boiling water freeze faster than cold water.
at the atomic or quantum level the heat energy or vibration is much more easily conducted into the surround cold environment due to the fact there being greater potential difference in temperature.

Almost exactly the same as electric potential difference which is measured in volts and the great it is the greater the force, and the heat flows much like in a short circuit.

I soo stoned so sorry my the typos and bad grammar.
Anonymous Coward
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12/25/2012 10:01 AM
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Re: Why does Boiling water freeze faster than cold water.
It's Christmas fer Christ's sake...
Anonymous Coward
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12/25/2012 10:04 AM
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Re: Why does Boiling water freeze faster than cold water.
how they can't work something that can be explained with pure logic I don't know...


We keep hot water inside of insulated containers to keep the damn thing hot, insulation = resistance and a none conductor of heat

Duh...
Anonymous Coward
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12/25/2012 10:05 AM
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Re: Why does Boiling water freeze faster than cold water.
Evaporation?

That's why it's also easier to dry yourself off after a warm shower than a cold shower.

Too bad a warm shower opens up skin pores and a cold shower closes them.

DAMN YOU PHYSICS!

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