What is Digg?314 Comments
- JDWTC, on 10/11/2007, -32/+184Yeah we city folks are sooo dumb!! We pale in comparison to the intellectual bastion of the provincial people.
P.S. salt lowers the freezing point of water. - Cmonkey67, on 10/11/2007, -9/+154Apparently this works for any ***** liquid in a container...it's called S-C-I-E-N-C-E.
- sotopheavy, on 10/11/2007, -5/+144He's from Chicago so this should make a lot of sense to him. In AP chemistry back in high school we learned that a mixture (e.g.: salt dissolved in water) has a lower freezing point than plain water. So water can actually be colder than 32 degrees F (0 degrees C) and still not freeze. Eventually the water gets colder than it would without the salt while sitting in the freezer and the heat transfers from the beer faster. It is why they throw salt on roads in Chicago when it snows. This makes it harder for the snow freezing over after it melts making the roads icy. By adding salt the melted snow will need much lower temparatures to freeze. mixtures (salt in water) also have higher boiling points to the same thing works for heating pasta. It can cook faster if you add a little salt in the water.
- benitojuarez, on 10/11/2007, -12/+132I'm going to have to correct a mistake in the article.
Step 1. Finish watching Mythbusters.
You all know this is where the guy got it from. - inactive, on 10/11/2007, -58/+159Not surprising "city folks" wouldn't know this one. Anyone who's ever cranked a handle on an old fashioned ice cream machine
would know this one. - fishbert, on 10/11/2007, -5/+68You're going to have to agree... but you're not going to have to use the 'reply' link.
God forbid if your important 'me too' comment gets nested and isn't right there for everyone to see. - mlawrence, on 10/11/2007, -12/+72Not only have I seen this a thousand times, but am I alone in just putting the ice IN THE GLASS WITH MY SODA?
- Brian48216, on 10/11/2007, -12/+56Holy crap....pretty disappointed in the crappy responses from Digg's audience thus far...
This is just an ENDOTHERMIC REACTION. When you put salt on ice, it forces a change in equilibrium of the system. In order to establish a new equilibrium, the ice will begin to ABSORB heat when it makes it's phase change from solid to liquid. So if you're at 32F (0C) and you add salt, the ice has to get it's energy to make the phase change from somewhere, and it pulls it in from the water around it, and further lowers the temperature.
Remember, melting ice is an ENDOTHERMIC reaction, energy is being absorbed, not released. - SIRBERUS, on 10/11/2007, -1/+24I've run into many people who didn't understand this. Last time I was at a casino hotel and they give you all the free bottled water you can drink... but it was warm, and me and my mate wanted to bring a couple chilled bottles down with us to the casino floor. I went down to the help desk to ask for some salt packets and they gave me a weird look, so I explained... and they were astonished. They said room service would bring them up. 10 minutes later (crappy service) there is a knock, and this guy has a weird ass grin on his face as he looks at me and my mate who was in my room watchin the tele. I didn't understand until I opened the bag and realized the dumb bloke had brought up 10 packets of bath salts. I'd wager he was smirking at the thought of the salt being used in some sort of ***** soup. I had to call back to the front desk, and again explain what the reason was... 20 minutes later I got my salt, super chilled some bottles of water, and was out the door.
- twangbender, on 10/11/2007, -6/+28this method is faster and most diggers probably own an air duster
http://www.metacafe.com/watch/513788/ice_cold_drinks_in_20_seconds/ - jcarleton, on 10/11/2007, -45/+66I'm going to have to agree with p51d007 on this one. I don't know many people who don't know this trick.
- vandy, on 10/11/2007, -0/+18wouldn't it be easier to ask the front desk for a cold water bottle?
- RpgActioN, on 10/11/2007, -1/+18What a waste of an air canister. Those things aren't exactly cheap, you know....
- scotty1024, on 10/11/2007, -2/+19Actually when you mix Rock Salt with water it undergoes a chemical reaction to form brine that requires heat AKA an endothermic reaction AKA it absorbs heat. So for cooling your beer more quickly you don't want to pre-mix the salt and water.
In addition, rather than rock salt whet you really want to use is so called Light Salt, available at most super markets next to the regular table salt. Light Salt contains Potassium Chloride which produces a lower melting point and a larger endothermic reaction than Sodium Chloride (regular table salt.)
Potassium Chloride is a common component of chemical ice packs.
If you watched Jericho they had an episode where they clumsily used ammonium nitrate to make ice cubes. This would chill a beer even faster but one needs to be really careful about the water as it isn't something you want to drink or get on your skin.
The solution you want to pre-mix is Calcium Chloride which is sold under the common brand name of DowFlake. This is the stuff that looks like little white balls on side walks in winter. Calcium Chloride is incredibly effective as a de-icer because when you mix it with water it has an exothermic reaction that produces a 60F rise in temperature eg melts the ice. But the resulting water now has a freezing point of -25F which means it works very effectively in a freezer to transfer heat out of beer (and is not poisonous to humans or plants in moderate doses.) - krisscofield, on 10/11/2007, -2/+18That would work, but I would hate to put ice in a glass with my beer. Yuck.
- haleym, on 10/11/2007, -1/+17Yep - per this forum posting by Adam Savage of Mythbusters, the water/ice should do it in 4-6 minutes, while adding the salt could get it down to 2:
http://ask.metafilter.com/52074/How-long-in-the-freezer-to-chill-a-Coke-from-89F-to-35F#786647
IMO, the extra 2-4 minutes wouldn't be worth wasting 2 cups of salt on. - xtrench, on 10/11/2007, -6/+21Yes because ice in your beer is *a good idea*
- sabach, on 10/11/2007, -0/+15You were in a casino and you were drinking water?
- quomen, on 10/11/2007, -1/+16So it actually took 33 minutes to chill the water.. right?
- Cmonkey67, on 10/11/2007, -2/+16That's crazy demon talk!
- inactive, on 10/11/2007, -1/+13I'm going to have to agree with Fishbert on this one. Too many people don't nest their comments properly
- bobdole369, on 10/11/2007, -4/+16This is well known. All you need is a ton of ice (you won't notice any effect if you only use a few cubes, you need like a 5 lb bag), some plain water, and a good amount of salt. Half water half ice is overkill, you need just enough water to "wet" the ice. Of course this is going to melt some of it so plan accordingly. Add the salt (how much? You can't have too much, so just chuck a few cups per 5 lb bag). Stir well. This causes the water to have a lower freezing point than 32F. Now the stirring action speeds heat transfer from the water to the ice. In terms Joe Blow would understand: "The constant stirring makes the water colder because it mixes the ice better with the water. The cold goes into the water from the ice." (Yes, I know there is no cold transfer, only heat, read above) Since the ice is well below 32F (usually around 0F in most peoples freezers), the water can get down to well below 32F as well. The stirring helps this along, and soon you have 25F or less water mixed with ice.
Now water is a much better conductor of heat than air is, so when you dunk your beer in this supercooled water, it only takes a few minutes to bring 'er down to cold. - noamsml, on 10/11/2007, -0/+12Um, I'm pretty sure that's in Fahrenheit.Otherwise I would be more worried about the 90C garage.
- no_root_toe, on 10/11/2007, -1/+12But with soda there's a problem of gas. Liquids hold a bigger about of gas when they are colder. So if you open a soda when it is warm all the gas will escape. Wait until the soda itself is cold and no gas will be lost in the air when you open the pressurized container.
- Ramble, on 10/11/2007, -8/+19I dunno..40C still seems a bit too warm for beer.
- vtruss8, on 10/11/2007, -0/+11Yeah, I've tried that before. But, you have to wash the can thoroughly afterwards, because they put that bitterant ***** in there now and that stuff tastes like pure ass (well, my theory of what ass would taste like, never actually tasted ass before)
- Jist, on 10/11/2007, -1/+11I pity the fool who don't nest his comments.
- Juano11, on 10/11/2007, -1/+11Actually the energy IS being released...from the beer...which is what he wants to make cold.
- pixelfishfood, on 10/11/2007, -0/+10Adding "a little bit" of salt to the pasta water doesn't really make the pasta cook faster. You would need to add A LOT of salt (cups, as mentioned in the article) to notice the difference. Adding a small amount of salt to the water improves the flavor of the pasta, but adding enough to make it cook faster would ruin it.
- inactive, on 10/11/2007, -4/+14"Apparently this works for any ***** liquid in a container...it's called S-C-I-E-N-C-E."
So, its not God doing it then with his magical-power-breath (TM)?? - sabach, on 10/11/2007, -2/+11He's cooling the air around the beer in 20 seconds. If he wanted to prove something he should crack the beer and put the thermometer down in the liquid.
- nyx210, on 10/11/2007, -0/+9You're doing it wrong.
- maddendude, on 10/11/2007, -2/+10I just try to squeeze the ice right into the can...
- sanman, on 10/11/2007, -1/+9If you pre-mix the salt into the water to make brine, it's much faster. Actually, some highways now spray the salt-water brine on the roads rather than just throwing salt, since the brine actually spreads better across the roadway.
- S4MF1SHER, on 10/11/2007, -1/+9He blinded me, with SCIENCE!
- LowRentDiggs, on 10/11/2007, -1/+9I know that old fashioned ice cream machines only work outside of city limits, but I have traveled outside of city limits once before and seen one of these contraptions at work.
- AngelaQ, on 10/11/2007, -5/+12It's not a reaction at all. Nothing reacts. Ice is just the solid state of water. You start with water and salt and end with water and salt.
- eclectro, on 10/11/2007, -2/+9First post to get it right. Also, by putting the beer in the freezer ( a twist the mythbusters did not do btw) the endothermic reaction is forced to take the heat straight from the beer instead of the beer *and* enviroment thus achieving a faster cooling time.
- inactive, on 10/11/2007, -1/+7"Holy crap....pretty disappointed in the crappy responses from Digg's audience thus far..."
You're new here, right? Digg likes to thump its chest as being a haven for intellect, but in reality it's just a haven for Mr. Knowitall keyboard jockeys that really don't know much about the topics they reply to other than they like to be heard. - dark_helmet, on 10/11/2007, -0/+6I prefer the mythbusters method with the CO2 fire extinguisher. That cooled 6 cans of beer in 30 seconds. Not exactly cost effective, but it sure cooled the beer fast.
- Smight, on 10/11/2007, -1/+7It actually makes the water boil at a higher temperature. You add the salt to stop the water from boiling over and to make your food cook faster in the hotter water.
- Xeworlebi, on 07/25/2008, -0/+6It's not impossible to put a bottle in a bucket. You just take the bottle and place it in the bucket.
- metateck, on 10/11/2007, -0/+5Actually, ice is not coldest when it is melting. Salt does nothing to change the actual temperature of the ice. Please have some clue of what you are talking about next time you post a comment. Salt only changes the temperatures of phase change for liquids, it doesn't increase or decrease temperature. Ice is actually at the warmest possible temperature it can be when it is melting.
- fishbert, on 10/11/2007, -0/+5The ice becomes "salt ice"?! This guy threw salt on ice water, which made the ice go from 32F to 0F?!?!
Ok, you fail.
Go directly back to 5th grade science class. Do not pass 'Go'. Do not collect $200. - kiwifish, on 10/11/2007, -0/+5Is it really an endothermic reaction? Or is it just that the salt forms a eutectic mixture which lowers the freezing point, thereby causing the ice to melt - which is a cooling process due to the latent heat being absorbed in the phase change?
(That's really a question, I'm a physicist, not a chemist) - bobotheking, on 10/11/2007, -2/+7The magic word here is "eutectic" (although I'll admit I'm just showing off-- most people know the basic principle but don't need to know the name).
According to Wikipedia, the eutectic point for salt and water is at 23.3% salt by weight. Any more and you're actually raising the freezing point:
http://en.wikipedia.org/wiki/Eutectic - geminitojanus, on 10/11/2007, -1/+5Yeah, and he quoted it entirely wrong too.. the MythBusters said it took them 15 minutes (IIRC).
I was almost certain this article would link to this instead:
http://www.asciimation.co.nz/beer/ - inactive, on 10/11/2007, -1/+5Is that why I fart more when its warm??
- marsbar, on 10/11/2007, -1/+5Beer is mostly water. Ice is water. If you put ice in beer you just make it slightly more watery. If you're drinking Guiness then sure, maybe not a good idea to add ice. However, if you drink American lagers then really whats the difference? Its like adding water to your water.
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