Re: Shake some supercooled water and you get ice, why?

On Feb 19, 6:01 am, "n...@xxxxxxxx" <Alien8...@xxxxxxxxx> wrote:
On Feb 18, 4:01 pm, andy everett <vze2q...@xxxxxxxxxxx> wrote:

I set out 5 half litter bottles of spring water after lunch. Temps just
below freezing. Around 6 pm, temps now in the low 20's, I put a chunk of
ice into one of the bottles, being careful opening the cap. Ice
instantly formed around the piece of ice. We know now the water in the
bottles are in a super cooled state. Next grab a bottle and shake
vigorously in such a way to impart circular motion. Small crystals seen.
Allow things to cool further. Open cap carefully and drop in a very
small amount of snow. Starting from the top a pretty group of ice
crystals forms.

On the last bottle I shook vigorously, the bottle became cloudy with
crystals, quickly I poured the mixture of water and crystals into a
measuring cup and filtered the crystals out with a paper towel. The
paper towel was squeezed to get more of the water out. Out of 16.9 oz.
of water less then .9 oz of the water was ice.

Excellent!

Time to get a good thermometer.

Yes, absolutely. I'd just love to know the temp of the remaining
water, and the temp of the supercooled water pre-freezing.

BTW, can you photograph the ice crystals per the drop-in-the-snow
trick? How far down into the water did they extend? Also, how'd the
rate of growth of the crystals go, fast, then slow, or what?

Mark L. Fergerson



Well thats supercool! Unfortunately the book fonts were too small and
graphs complicated to seem bogus. So my guess is that there is a
difference in the way heat is conducted - lets say "by touch", and the
part where molecules tend to bond into ice. So they're already cold
enough to freeze (all kinetons conduced away) but their positions (in
some axis perhaps) did not happen yet.

.

Relevant Pages

  • Re: Shake some supercooled water and you get ice, why?
    ... ice into one of the bottles, ... We know now the water in the ... or change in energy density. ...
    (sci.physics)
  • Re: Shake some supercooled water and you get ice, why?
    ... ice into one of the bottles, ... We know now the water in the ... The article that Ed refereed to suggested that above some temperature ...
    (sci.physics)
  • Re: Shake some supercooled water and you get ice, why?
    ... ice into one of the bottles, ... We know now the water in the ... Next grab a bottle and shake ... Small crystals seen. ...
    (sci.physics)
  • [LogoForum] Re: snow flakes
    ... If you're interrested in photos of snow flakes look up "Snowflake ... There are plenty of `interested parties' who want or `need' to know which way that next still-liquid molecule of water is going to crystalize during the `phase change' to solid. ... KURT VONNEGUT may have`invented' Ice 9 as a counterpoint of a concern his brother Bernard just may have had when he was following up on his insight that silver nitrate crystals bore a rather uncanny resemblance to ice crystals and that they might `teach' water `the pattern' to form ice. ...
    (comp.lang.logo)
  • Re: how safe is the water in Italy and Rome
    ... Or should I stick to bottled water? ... bars and alike you can also find smaller 0.5 liter bottles ... Can't help you about ice, that's something I hate. ... In a restaurant or bar you can ask for "ghiaccio", ...
    (rec.travel.europe)