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+1

 Posted: Thu Apr 22, 2004 7:24 pm    Post subject: 1 Many moons ago a friend told me about an experiment in his physics class. They took "cold" and "warm" water and then put them in a freezer to see which would freeze first. According to my friend the warm water froze first. I argued against the notion, I mean it flies in the face of reason. At some point the warm water will cool to the temperature that the cold water started at. He said he saw it with his own eyes but couldn't give a cause for the effect. Occasionally over the years I've tried to find support for his claim but haven't found it. I figured this forum would be a good one to post the question in. All things being equal (container, freezer, amount of water, etc), is it possible for some water at Y + X degrees to freeze faster than the same amount of water at Y degrees (assuming X is positive)?
Vinny
Promiscuous enough

 Posted: Thu Apr 22, 2004 8:27 pm    Post subject: 2 troll
Quailman
His Postmajesty

 Posted: Thu Apr 22, 2004 8:41 pm    Post subject: 3 Old physics teacher trick. Add quite a bit of salt to the cold water beforehand. If you get the right concentration, it will freeze at zero degrees [fahrenheit]. The warmer water will freeze when you expect it to.
extropalopakettle
No offense, but....

 Posted: Thu Apr 22, 2004 8:43 pm    Post subject: 4 http://ask.yahoo.com/ask/20030930.html Also, "water heated to, say, 195 degrees would freeze three to ten minutes faster than water at 140-175 degrees." http://www.straightdope.com/classics/a2_098b
pikachamp
swore in chat!

 Posted: Thu Apr 22, 2004 8:48 pm    Post subject: 5 I've heard of this before, apparantly if the hotter water is hot enough, some of it will initially evaporate, and it'll freeze faster for having less mass.
Vinny
Promiscuous enough

 Posted: Thu Apr 22, 2004 8:58 pm    Post subject: 6 There *was* a thread on the GL about this before! A few years back. How soon we forget ... sigh ...
+1

 Posted: Fri Apr 23, 2004 2:56 am    Post subject: 7 To forget it, I would have had to see it in the first place my little gremlin.
Vinny
Promiscuous enough

 Posted: Fri Apr 23, 2004 3:18 am    Post subject: 8 Well, that is true. But *I* have read it, and that's what matter. *sic* I kid! And I can't even remember what was said in that original thread. I think it's even a Cecil's article. Some of you Straight Doper should look up uncle Cecil's answer. (Or do they charge you for that now?)
Vinny
Promiscuous enough

 Posted: Fri Apr 23, 2004 4:08 am    Post subject: 9 ah, here we are. http://www.straightdope.com/classics/a2_098b.html
wordcross

 Posted: Fri Apr 23, 2004 5:27 am    Post subject: 10 Too late... Do you even bother to read the thread before you post, Vinny ------------------ GLer Sheep! Googlepic game
Legion
Daedalian Member

 Posted: Fri Apr 23, 2004 12:31 pm    Post subject: 11 Yeah, water's pretty freaky stuff. http://www.lsbu.ac.uk/water/explan4.html#mpemba
Vinny
Promiscuous enough

 Posted: Fri Apr 23, 2004 3:15 pm    Post subject: 12 Hey, I got a question for you, wordcross: Shaddup!!!
Will
Won't

 Posted: Mon Apr 26, 2004 4:11 am    Post subject: 13 in the warm water the molecules are moveing faster thefore the molecules come into contact with other the ones that have been to the side of the container cooling down. You can probaly get the picture now.
Legion
Daedalian Member

 Posted: Mon Apr 26, 2004 2:01 pm    Post subject: 14 What??? Have you read any of the references that have been posted? [This message has been edited by Legion (edited 04-26-2004 10:02 AM).]
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