supercooling water

[japan rocks/andromeda]

can boiled water be supercooled?,it can freeze faster than cold water but can it be supercooled ? i think it can because i think boiled water has no impurities and that it can be supercooled, do you

Edited December 11, 2010 by justin bieber rocks

[Incendia]

It belongs in physics...

[John Cuthber]

It belongs in speculations because of this bit

" i think it can because i think boiled water has no impurities "

If I take some water and add sugar then boil it, the sugar is still there.

Boiling water doesn't generally remove impurities.

Edited December 12, 2010 by John Cuthber

[Incendia]

Nope it belongs in physics because his question is whether or not the reader/replier thinks boiled water can be supercooled.

[ewmon]

can boiled water be supercooled?,it can freeze faster than cold water but can it be supercooled ? i think it can because i think boiled water has no impurities and that it can be supercooled, do you

I don't need to speculate because I have repeatedly supercooled both very pure water and water containing huge amounts of impurities, so boiled water can probably be supercooled, but it also probably depends upon the impurities.

[swansont]

Boiling gets rid of dissolved gases. Yes, it can be supercooled. That's not to say that it will always be supercooled, because there are other parameters to consider.

[John Cuthber]

The idea that "i think boiled water has no impurities" is speculative to the point of being plainly wrong.

Anything based on that idea is also speculative.

The fact that water can generally be supercooled a bit isn't speculative, it's just an observation. The given reason is pure speculation.

 

anyway there are two questions in the OP

"can boiled water be supercooled?"

to which the answer is yes

and "i think it can because i think boiled water has no impurities and that it can be supercooled, do you ?"

to which the answer is (from most people's point of view), no.

[CaptainPanic]

Why would boiled water freeze faster? Because of those few ppm of N2 and O2 that were boiled out? I find it hard to believe that it's of any significance.

[zheng sheng ming]

it is an interest question!

[Incendia]

Boiling water would freeze faster because...

http://math.ucr.edu/.../hot_water.html

 

...but water that has been boiled then left to cool would not freeze faster then normal water of the same temperature.

Edited December 18, 2010 by ProcuratorIncendia

[CaptainPanic]

So, boiling water doesn't freeze faster, except under very specific conditions.

 

The point in the link by Incendia (above) that makes the most sense to me (i.e. I think it has the greatest effect) is the convection as a result of the cooling process. The difference in heat transfer between a completely stagnant layer of water and a layer with any convection is large.

 

p.s. thanks for the link, Incendia.

Edited December 20, 2010 by CaptainPanic

[zheng sheng ming]

can boiled water be supercooled?,it can freeze faster than cold water but can it be supercooled ? i think it can because i think boiled water has no impurities and that it can be supercooled, do you

 

 

yes! the warm water can freeze faster than cold water !

[Incendia]

...but he did say "boiled" water. Not "Boiling" water.

[zheng sheng ming]

I think this is a great question,

[Dave]

Hi zheng,

 

Thanks for taking the time to post, but if you just want to say thanks for posting the question it's customary to give the poster some reputation (or karma). You can do this with the little plus button at the bottom right corner of their post.

 

Thanks,

 

Dave

[zheng sheng ming]

can boiled water be supercooled?,it can freeze faster than cold water but can it be supercooled ? i think it can because i think boiled water has no impurities and that it can be supercooled, do you

 

 

I like the question!

[CaptainPanic]

I like the question!

One of our mods has a signature that tells you to stop failing the Turing test... He's quite serious about that.