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Instant Hot Ice

Hits: 100645 | Rating: (3.7) | Category: Science | Added by: kendrickwall
Page: 1 2 3 4 5 6 Next >   Jump to: Bottom    Last Post
Male, 13-17, Western US
 76 Posts
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.

Male, 30-39, S. America
 1 Posts
Friday, August 28, 2009 4:33:04 PM
plz i need the name the music playing in background.

Female, 18-29, Eastern US
 60 Posts
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..

Female, 13-17, Western US
 377 Posts
Sunday, April 13, 2008 11:55:50 AM
wowie! that was beat. he has the magic touch ;)

Male, 13-17, Midwest US
 44 Posts
Tuesday, January 01, 2008 11:57:13 PM
i...gotta....try that! <3

Female, 18-29, Europe
 95 Posts
Tuesday, January 01, 2008 4:10:02 PM
OMG thatsdratningamazing!!!

Male, 18-29, Southern US
 46 Posts
Monday, December 31, 2007 7:43:39 PM
someone take a video of u eating it..

now thats pure entertainment.

Female, 13-17, Eastern US
 29 Posts
Monday, November 05, 2007 10:32:39 PM
is it acually HOT??

Female, 18-29, Western US
 17398 Posts
Saturday, June 16, 2007 6:11:22 PM
That is fricken awesome. I really need to try that out sometime.

Female, 13-17, Eastern US
 926 Posts
Saturday, June 16, 2007 5:47:36 PM

Male, 18-29, Midwest US
 357 Posts
Tuesday, June 12, 2007 8:47:53 PM
it happens because it is a supersaturated solution, and your finger becomes the seed

Female, 13-17, Eastern US
 1467 Posts
Tuesday, June 12, 2007 8:10:12 AM
God, i want to try that sooo badly.

Male, 18-29, Europe
 207 Posts
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:
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

Male, 18-29, Western US
 4 Posts
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.

Male, 18-29, Europe
 207 Posts
Monday, June 11, 2007 3:59:18 PM
54 celcius*

Male, 18-29, Europe
 207 Posts
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

Male, 18-29, Western US
 4 Posts
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?

Male, 18-29, Europe
 207 Posts
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

Male, 18-29, Western US
 4 Posts
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?

Male, 18-29, Western US
 4 Posts
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?

Male, 13-17, Europe
 315 Posts
Friday, June 08, 2007 12:51:16 PM

I love it, faved right away!

Female, 13-17, Eastern US
 955 Posts
Thursday, June 07, 2007 2:26:23 PM
yeah i have a have a handwarmer that works like that!

Male, 13-17, Midwest US
 22 Posts
Wednesday, June 06, 2007 11:23:46 PM
my bio teacher showed me how to do this before

Male, 18-29, Southern US
 74 Posts
Wednesday, June 06, 2007 10:10:28 PM
what is this background song? i remember hearing it on a hunting channel before...

Male, 18-29, Southern US
 286 Posts
Wednesday, June 06, 2007 9:39:01 PM
Coolness! I gotta try this myself in a bigger container

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