 MastaPlan23
Male, 13-17, Western US
 76 Posts
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Saturday, February 06, 2010 6:20:01 PM
see i dnt understand y we cant do amazing fun poo like this in my science classes. |
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msmpinheiro
Male, 30-39, S. America
1 Posts
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Friday, August 28, 2009 4:33:04 PM
plz i need the name the music playing in background. |
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 Chasya
Female, 18-29, Eastern US
60 Posts
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Tuesday, January 06, 2009 1:25:46 AM
ok so is it actually hot?does it melt?or does it turn into like a clay/plaster kind of thing...guess ill have to try this one myself.. |
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 eeeriddler08
Female, 13-17, Western US
377 Posts
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Sunday, April 13, 2008 11:55:50 AM
wowie! that was beat. he has the magic touch ;) |
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 YouDaftPunk
Male, 13-17, Midwest US
44 Posts
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Tuesday, January 01, 2008 11:57:13 PM
i...gotta....try that! <3 |
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 Hanninha
Female, 18-29, Europe
95 Posts
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Tuesday, January 01, 2008 4:10:02 PM
OMG thatsdratningamazing!!! |
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 arkansas_guy
Male, 18-29, Southern US
46 Posts
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Monday, December 31, 2007 7:43:39 PM
someone take a video of u eating it..now thats pure entertainment. |
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 beca3523
Female, 13-17, Eastern US
29 Posts
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Monday, November 05, 2007 10:32:39 PM
is it acually HOT?? |
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 Kraken
Female, 18-29, Western US
17398 Posts
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Saturday, June 16, 2007 6:11:22 PM
That is fricken awesome. I really need to try that out sometime. |
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 Mbirdgurl
Female, 18-29, Eastern US
926 Posts
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Saturday, June 16, 2007 5:47:36 PM
Awesome... |
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 mrwnt
Male, 18-29, Midwest US
357 Posts
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Tuesday, June 12, 2007 8:47:53 PM
it happens because it is a supersaturated solution, and your finger becomes the seed |
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 shiggin
Female, 13-17, Eastern US
1467 Posts
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Tuesday, June 12, 2007 8:10:12 AM
God, i want to try that sooo badly. |
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 Crowe
Male, 18-29, Europe
207 Posts
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Tuesday, June 12, 2007 2:20:43 AM
i've found myself somewhat gripped by understanding this process fully, anyone else who'd like that lil bit more detail i found some good info:
http://home.howstuffworks.com/question29...
i've not found anywhere the explaination as to how the chain reaction continues after it begins. it seems the crystalised sodium acetate solution particles act as nucleation points for further crystalisation. appologies if everyone else worked it out ages ago and i'm rambling on. Crowe |
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 OneFreeMan
Male, 18-29, Western US
4 Posts
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Monday, June 11, 2007 6:25:44 PM
A saturated sodium acetate solution freezes at around 60 degrees (140F). So basically unless you put the stuff in the oven, liquid sodium acetate is ALWAYS "supercooled" (i.e., below it's freezing point while remaining liquid). It doesn't have anything to do with refrigeration or "exposing it to heat." A liquid sodium acetate solution at room temperature is supercooled.Moving the solution gently or exposing it to air does not trigger the reaction because it does not introduce a nucleation point (a foreign particle large enough to attract/form ice crystals). This is how the demonstrator is able to pour the solution into the tray without triggering the reaction. If he poured much faster or if there were a large dust particle in the tray, the reaction would have occurred immediately on contact. |
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Crowe
Male, 18-29, Europe
207 Posts
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Monday, June 11, 2007 3:59:18 PM
54 celcius* |
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Crowe
Male, 18-29, Europe
207 Posts
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Monday, June 11, 2007 3:00:06 PM
i like science, yeah, nowt wrong wid bein a nerd. what's the freezing point for the sodium acetate solution? 54 celius? i made the assumtion that introducing heat into the solution (when at 4 ish celcius from the fridge) triggered a -chemical- exothermic reaction expelling heat from the solution bringing it down below its freezing point. seemed the logcial answer as the heat given out by any part of the solution reacting would in turn trigger the reaction throughout the rest of the chilled solution (well, supercooled, as it seems). if agitation of the solution or introducing a foreign substance would trigger the reaction, i would have expected moving the solution or exposing it to air to have such an effect. though, by the same logic, i did wonder why exposing the solution to heat to when removing it from the fridge didn't trigger the reaction. we didn't use the term supercooled when i was in school/college, so don't take the pi**, freeman, i ain't thick. i asked where not what. Crowe |
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OneFreeMan
Male, 18-29, Western US
4 Posts
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Monday, June 11, 2007 1:33:47 AM
@Crowe: " where did the whole 'supercooled' thing come from? they didn't use anything that cool (pun intended)"Do you know what the term "supercooled" means? Do you understand that not all liquids freeze at temperatures you would consider "cold"? The reason this sodium acetate solution freezes so rapidly is because it's ALREADY below it's freezing point and simply needs to be agitated or have some foreign particle introduced to begin the chain reaction of ice crystal formation. That is what the term "supercooled" means. By definition. Why do you think it freezes when he touches it? Because his finger is really cold? No, because the freezing point of the solution has already been reached. We're not talking about rocket science here, people. All you have to do is Google "supercooled" to understand. You know how to Google, right? |
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Crowe
Male, 18-29, Europe
207 Posts
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Saturday, June 09, 2007 7:43:23 AM
that's awesome :) looks real fun. i dunno but people seem to have got confused over the whole exo/endo - thermic reactions part. exo - releases heat, endo - absorbs heat. for the solution to freeze it would have to get colder (ie. release heat) and therefore go through an exothermic reaction. where did the whole 'supercooled' thing come from? they didn't use anything that cool (pun intended) ;) Crowe |
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OneFreeMan
Male, 18-29, Western US
4 Posts
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Friday, June 08, 2007 7:57:48 PM
@notapervert: "Shame on all you who said it was supercooled, asking people to 'go back to school' :["... @Andy1821: "hehe, anyone remember people writing in caps about how it was "supercooled"? :P"
Umm, what are you two talking about? It IS supercooled. I mean, I hate to be negative, but try to understand what a word means before posting snarky comments about it, okay?
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OneFreeMan
Male, 18-29, Western US
4 Posts
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Friday, June 08, 2007 7:43:20 PM
@krusty2514: "They were wrong in the video. In exothermic reactions, heat LEAVES hence the exo part of exothermic."Uhh, yes. Heat LEAVES the reaction, hence entering the surroundings. Thus, "it gets hot" (as in you will feel heat if you touch it or the container in which it is taking place). So how was the video wrong, exactly? |
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 blue_mess
Male, 13-17, Europe
315 Posts
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Friday, June 08, 2007 12:51:16 PM
OMD! WHERE CAN I BUY SOME CHEMICALS? :)I love it, faved right away! |
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 ashwey
Female, 13-17, Eastern US
955 Posts
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Thursday, June 07, 2007 2:26:23 PM
yeah i have a have a handwarmer that works like that! |
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williskewlas
Male, 13-17, Midwest US
22 Posts
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Wednesday, June 06, 2007 11:23:46 PM
my bio teacher showed me how to do this before |
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 imatwirp
Male, 18-29, Southern US
74 Posts
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Wednesday, June 06, 2007 10:10:28 PM
what is this background song? i remember hearing it on a hunting channel before... |
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 Pyro_Raver
Male, 18-29, Southern US
286 Posts
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Wednesday, June 06, 2007 9:39:01 PM
Coolness! I gotta try this myself in a bigger container |
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