Supercooling Experiment

Submitted by: lovers007 9 years ago in Science
/media/5049_SupercoolingExperiment.flv
Water changes from liquid to ice on contact. My brain hurts from trying to figure out how this works. Any theories?
There are 83 comments:
Female 1,231
A bottle of pure, distilled water will do that. Just sayin` it`s possible.

Let`s gripe about the repost anyway. XP

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Male 895
extremely pure water!
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Male 15
It could be a supersaturated liquid, or it could be nucleation.
But by the way the crystals are forming, by the -frost- on the bottle, and the fact that it`s melting from the ambient temperature in the air, I`d have to say it`s nucleation.
Mythbusters did an episode which covered a type of nucleation, except it was super heated water in a microwave. As soon it got disturbed it turned instantly into steam.
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Male 358
Sodium acetate hyper saturated solution, oh and repost
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Male 36
Wow. Some of these posts/people are so moronic and stupid, I fear for the future of the earth.
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Female 488
it`s not water

but i think that was allready mentioned q_p

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Male 534
People still haven`t seen or figured this out?
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Female 678
its the same exact thing that is used in the heating pad that hunters and construction workers use. still pretty cool though.
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Male 36
repooooooooooooooooooost
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Male 134
This has got to be like the 3rd repost of this! Read the comments, people have it right!
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Male 575
Instant Slushee
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Male 909
Definitely, SexGangChild.

Science has no place here!
Just badass cold martial artists from video games!

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Male 1,036
Has anyone said "COOL" yet??
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Male 2,486
You guys are all crazy.

Science.. pshh.

It`s gnome magic.

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Male 8
you are all stupid water can freeze either way, either its supercooled or its Sodium Acetate but since the ice hasn`t taken on the trademark whitish tinge that Sodium Acetate causes it is clearly the super cooled type this time but the other is still another way and an easier way of doing this
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Male 18
This is simple. It`s Sub-Zero`s hand doing that.
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Male 308
I usually don`t gripe about repost...but isn`t this the 4 or 5 time this has been up in the past year....?
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Male 76
That`s sodium acetate.
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Male 1
Sorry, but you idiots shouldn`t give your guesses as answers. THIS IS SODIUM ACETATE!!! Sodium acetate freezes at about room temperature, and melts at 100C. some have said it cant be because it turns back into a liquid. not true, because the reaction is exothermic, which means it gives off heat and melts itself again. If given enough time, it would freeze permanently. 9th grade bio class ppl.Fun with sodium acetate In this video, the acetate is poured slow enough so that the amount of heat being given off by the reaction is not enough to melt it again
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Male 730
holy poo its freezing water. drat me with a rake. my mind is blown. anyone who doesn`t believe this kind of poo isn`t particularlly hard to do, have fun with your 3rd degree burns when you flash boil something in the microwave.
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Male 1,497
Jesus, this is a respost from about when i first joined IAB...
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Male 169
wat the hell? when the water turns to slush it doesnt look very real...look close at where the water turns to slush and it kind of looks edited

and if it was "supercooled" how come it turned back into water after a short time in the bowl? fake

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Male 21
repost...
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Male 45
Re-read the wiki article....It says you can freeze PURE water to about -41 degrees C without it crystalizing, but to go any lower than that without it crystalizing you need to cool it at 10^6 K/s...so no specialist equipment needed.

Everyone here has a bloody freezer, get off your arses, buy some distilled water and try it instead of debating it ffs!!

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Male 24
I don`t know how ti works unless it isn`t really water, they have some chemicals that will do that though, freeze almost instantly.

Where did this video come from though? A university or somethin?

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Female 353
it works cause its a repost!
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Male 144
Oh God is this a repost!! But some of the responses are new, so here`s my two cents.

I`d be in the supersaturated camp, for a few reasons, but here are hopefully two original ones.

The Wiki article on supercooling states that cooling must be rapid, (10^6 K/s) and I see no apparatus for rapid cooling there, or even any signs of cold. No way would contact with a cold surface, through the bowl and towel cool that fast. I think we`re talking micro seconds here.

Also, while agitation might (I`m not denying it 100%) cause the "freezing" effect, watch how the stuff piles up on itself. The supercooling theory states that a mere shaking of the dish would do, but this looks like "The more of the mystery liquid you add, the more of the ice like stuff you get," and that doesn`t really fit in.

Maybe it`s just me , and maybe I`m dead wrong.

Meh

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Male 244
"You can freeze water at lots of temperatures, just need high pressure"
Or low pressure, or any pressure with pure distilled water.
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Male 1,266
You can freeze water at lots of temperatures, just need high pressure
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Female 121
awesome
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Female 175
I`ve seen this before
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Male 244
also, let me reiterate,
IT`S JUST WATER, THERE IS NOTHING ELSE IN THE BOTTLE.

At least, you CAN do it with just water... that`s not necessarily how it`s done in the video.

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Male 244
It`s supercooled water.

It`s not a trick.

get DISTILLED water (key word thar... if you missed it it`s DISTILLED) and cool it to an extremely low temperature. IT WILL NOT FREEZE.

The mechanics behind water freezing rely on an impurity for the crystalline structure to form around, so pure water does that when comes in contact with, for example, salt, sugar, dirt, soap, whatever that could have been in the little cup.

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Male 101
i would explain it to you but instead watch the OTHER 4 VIDEOS EXPLAINING IT ON THIS WEBSITE. btw 4x repost
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Male 81
supersaturated
you put salt or something in when it is boiling, because it can hold more than it usually can. when you cool it down, unless you disrupt it, it will stay in that state. its all chemistry
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Male 4,793
SOLUTION TO HOW IT WORKS!!!
k, first off, it IS water, but its been saturated with (i dont remember...i think it was potassium nitrate, AKA saltpeter, not sure though you can find that out on your own) but its completely saturated with the given chemical, then it gains a special property after its cooled to freezing point or less, and it requires something for the ice crystals to form around, such as an air bubble, a finger, hell even a grain of rice dropped into the water would do it. if you MUST know more you can google it or look around on wikipedia, im sure they have more in-depth info on the phenomenon. huh...thats a nice word, phenomenon, sounds weird if u say it more than once...phenomenon. sounds like an egyptian king..Pharaoh Phenomenon the Third! oh crap...i babbled about random stuff didnt I? Ah well...w/e, phenomenon.

phenomenon.

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Male 290
ya pretty sure manga monkey has it right
ive seen this so many times before
WHOOPY POO!
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Male 134
Whatever.
It`s still cool, be it water or other.
I hate these kinda posts, though. Gives those guys who sit at home all day a chance to wave their verified wikipedia PhDs alongside their over inflated e-peens.
If you KNOW something, post a link.
If you;re guessing, don`t be an ass about it.

x.

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Male 28
ok just so people know something similar happened to me i took a case of 4 bottles out of the freezer, but before i did i checked them they where all 100% clear unfrozen i closed the box back up and moved them to my room i took them out of the box one was frozen solid and white two where half way and one was fine. i took the one that was normal and shook it a little and the entire thing turned into slush and ice
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Male 239
re-yawn, again.
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Male 1
No, that video seems quite possible. I have had something similar happen to me with a bottle of deer park spring water. I left it lying (horizontal) down in the freezer for I believe close to a hour or half hour, either way, when I grabbed it out of the freezer it was still in liquid form. As soon as I tipped the bottle upright it started to freeze immediately, and looked a lot like what it did in the video.
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Male 1,024
endless reposts on i-a-b
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Female 311
If you get a small bottle of evian and put it in the freezer. After a couple of hours it should still be liquid, hit the bottle against something and it will instantly change to soft ice in front of your eyes.
I have done this for years as I eat ice constantly. It looks weird and I have no clue how it happens but it is easy to do yourself if you get the timing right. It was just pure pot luck with me.
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Female 180
I don`t really care if it`s water or not, its pretty damn cool.
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Male 15,510
Hmmm I dont think that is water in the first place
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Male 1,072
Its sodium acetate

look up, hot ice or something along those lines

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Male 96
It`s a mixture of water and ammonium nitrate. Ammonium nitrate is the stuff you find in cold compresses.
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Male 64
The people that claim to know this is definitely super cooled water makes this repost so much better!
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Male 188
I love how everyone agrees its a really old, often reposted trick - but then half the people definitively assert it`s one thing and the other half assert it`s something completely different.

It`s really liquidised unicorn horn, it freezes on contact with pure evil (smeared on the dish)

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Male 8
i think this is the third time this has been posted on i-am-bored...still cool
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Male 1,036
Jeezus beneezus, this has been on at leats a dozen times.
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Male 84
lol, wow. definately a repost. and nothing new. sorry.

All that it is is a supersaturated liquid(water). Like others said, simply boil water, disolve the solid, then cool it back off(without disturbing it). Any little disturbance will cause the solid to reform. Hand warmers are made by doing this (if you`ve ever seen them, you simply bend a little metal disc which disturbs the supersaturated liquid, and releases heat as the solid forms)

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Male 11
This is possible Try doing it with a snapple. Put a snapple in the freezer. let is stay still for an hour or more. watch it when you pull it out if it is still liquid and you shake it a little it will turn to a slushie! trust
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Female 1,244
So it`s water mixed with something...not just water...lame
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Male 453
Snore old news
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Male 205
ok, i admit i havnt watched the video, but here goes my theory.

its water thats below 0degrees, but perfectly `smooth` and undisturbed. touching it provides something for the ice to crystallise around. you need something for the crystals to form around before they will appear.

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Female 241
cool!
and im baffled!
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Female 1,395
It reminds me of cupids penis.
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Male 505
It`s some sort of chemical as has been said, and i think its sodium acetate.

Its the same stuff they use in the gel hand warmers, when you click the "button" in the gell pack, its solidifies, and heats up.

And brokenjohn, the sodium acetate wouldn`t stay solid, because its not completely sodium acetate, its still got water in it.

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Male 464
Sodium acetate stays solid afterwards, where the one shown in the video was reverting back to liquid.
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Male 695
Easy trick... The cup contains spirits that holds a temperature under the freezing point for water. And the water in the bottle is just above freezing. 1 degree celsius or something like that.
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Male 3
two words: sodium acetate. not a supercooled liquid, it is a supersaturated solution. any hard movement or contact with a seed crystal sets it immediately crystallizing. it looks like ice but its actually hot. hot ice
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Male 838
While it is possible to do this with supercooled water, the purity of the water would have to be EXTREMELY high, and it doesn`t seem all that likely in a plastic drinking bottle in a standard room. More likely it`s sodium acetate, which forms something called "hot ice".
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Male 53
That is a supercooled liquid. There is a similar effect for boiling. These peculiarities of the mechanism of change of state apply not only to water, but to most fluids.
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Male 53
Water can be cooled several degrees below its freezing point. If there are no nucleation sites present(something for the ice crystals to latch onto), the water will not turn into its crystal form (ice). That is why it remained liquid in the bottle.

However, when you pour it out, air bubbles are introduced. These are adequate and abundant nucleation sites, and the water will freeze immediately.

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Male 1,958
Then let us never talk about it again
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Male 124
yeah it is water but its not freezing,

i cant remember the compound but what you do is, heat the water, then make a highly saturated solution of the compound (i think its acetyl acetone but dont quote me on that) then went thats all dissolved and saturated you refridgerate the water

sine theres now more compound in the water than the water can deal with, when you pour it the compound starts to crystalise, the acetyl acetone or whatever is just resolidifying

Nothing to do with cooling or supercooling at all, and there are no state changes, other than going from "in solution" to "out of solution"

You`d think this thing had been reposted enough for people to know this by now

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Male 1,958
No, it`s water. You need to get water that is very pure. Watch this video and read what the guy has to say about it
http://www.youtube.com/watch?v=lISK1YFcZBM
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Male 121
So no its not water
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Female 69
I dont gettitt.....
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Male 121
About a year ago a video was posted on how to do this : Instant Hot Ice
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Male 1,958
Here`s the link that wiki page Supercooled water
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Male 1,958
Yeah, it`s water. Wiki says it`s possible. Though I don`t really understand the math behind it. Cause you know, not a physicist.
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Male 4,014
IT IS WATER. Seriously, you people can find your way to this website, can you not find GOOGLE??
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Female 66
Okay, well maybe I should have watched the whole thing. . . I`m going to go with the "it`s not water" theory!
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Male 4,014
It is supercooled water, and one can make water colder than the freezing point if it is very pure and not disturbed. Then, any small disturbance, like pooring it, will create tiny bubbles, which cause the water to turn into ice crystals. Its cool.
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Male 1,958
about it not being water. Don`t know if it`s repost or not
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Female 66
Um. . . no chemist here, but maybe the bowl is sitting on top of some liquid nitrogen that you can`t see because the towel is in the way (which also prevents it from breaking)? That`s what I would think anyway.
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Male 106
looks like the bottle is pooting
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Male 1,958
I agree with TheNine.
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Male 395
repost?
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Male 395
that`s not water and its not supercooled!
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Male 464
It has something to do with the water moving that turns it into ice.
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