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Isn't the Ideal Gas Law a law of chemistry anyways? ;)

Great now that stupid song from high school chemistry is stuck in my head.

"PV equals nRT...doo dah doo dah."

I am just taking a guess from what I know on working on automotive ac system. Introducing a vacumm on the ac system before charging the system reduces the boiling point of moistier causing it to turn to vapor and be removed from the system. I would then assume that would also reduce the freezing point as well. When the vacuum is then removed the boiling and freezing points would return to the normal tempatures allwing the water to instantly freeze. Just my 2 cents, not worth much.

Dragonfighter wrote:Okay geniuses, I don't have film of this but a long time ago I had put several bottles of water in the freezer but a lot of them never solidifed. What was cool (no pun intended) was I would take one, just compress the side lightly and when I released it it instantly crystallized...it was like having powers. No one has ever been able to explain it adequately. Any takers?

FWIW, I got the ideal gas law. Been a long time since I even thought of stuff like that.

IIRC it's very similar to superheated water that doesn't boil. If you heat or cool water evenly enough and in a container with little or no nucleation sites, the water can go below or above the accepted freezing and boiling points. With superheated water, a small shock can cause a "seed bubble" that causes a chain reaction and a lot of the water turns to steam instantly (which isn't good for the person who just grabbed the cup). The same thing happens when water is frozen without the formation of seed crystals.

7075-T7 wrote:

Dragonfighter wrote:Okay geniuses, I don't have film of this but a long time ago I had put several bottles of water in the freezer but a lot of them never solidifed. What was cool (no pun intended) was I would take one, just compress the side lightly and when I released it it instantly crystallized...it was like having powers. No one has ever been able to explain it adequately. Any takers?

FWIW, I got the ideal gas law. Been a long time since I even thought of stuff like that.

IIRC it's very similar to superheated water that doesn't boil. If you heat or cool water evenly enough and in a container with little or no nucleation sites, the water can go below or above the accepted freezing and boiling points. With superheated water, a small shock can cause a "seed bubble" that causes a chain reaction and a lot of the water turns to steam instantly (which isn't good for the person who just grabbed the cup). The same thing happens when water is frozen without the formation of seed crystals.

Okay, that makes perfect sense. I preferred the temporary super powers theory though.

Phorget Physics. Super Powers forever!!!!

Dragonfighter wrote: Okay geniuses, I don't have film of this but a long time ago I had put several bottles of water in the freezer but a lot of them never solidifed. What was cool (no pun intended) was I would take one, just compress the side lightly and when I released it it instantly crystallized...it was like having powers. No one has ever been able to explain it adequately. Any takers?

FWIW, I got the ideal gas law. Been a long time since I even thought of stuff like that.

I suspect that when you squeezed it, you pushed air out, and that lowered the air pressure. Water freezes at different rates according to the ambient air pressure. Higher pressure means lower freeze point.

MedicMan218 wrote:I was getting a snack last night and after I poured myself a nice tall glass of milk I guess I didn't put the cap back on very well and it started acting odd....
Can anyone explain what was happening or is my milk jug possessed?

[youtube]http://youtube.com/watch?v=s_61pV8Pdbc[/youtube]

Milk is white. Ghosts are white. Isn't it obvious?