Dry Ice in Water
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- čas přidán 3. 11. 2007
- This is the beginning of a series of demonstrations that I do with my students using dry ice. It simply shows that dry ice is more dense than water, as is the carbon dioxide released more dense than air. It is also possible to see the cloudy bubbles formed by the gas.
- Jak na to + styl
=] you sound like a fun teacher. kudos to you for keeping our kids entertained through education
Wow! Im from Chile and i think professors with this much passion about their work is the kind that really make a difference between the education systems of a 1st world countrie and 3rd world, i wish more like this were teaching here. Really good job :)
I came to watch the smokey effect, but I learned some stuff too! Nice going, mate!
at around 2:30 i love how he just flicks the piece of dry ice and it keeps going
Ok Thanks! I JUST ordered dry ice last week. I should be getting it an day now I'll be sure to test it out. Thanks for your help, I appreciate it. I'm going to test it out and post it when I get the chance.
Thanks for the compliment!
I enjoyed your demonstration showing very much. How high into the atmosphere can the CO2 diffuse?
@Spaghetteyes It is water vapor from the air (or if in a beaker like this water from the water int eh beaker frozen around it).
Having said that, if you don't know I would strongly advise against consuming it, especially if it was in a science classroom which could have all sorts of contamination.
You sound like a cool teacher. I wish I could have you for science
Thank you.
It quite frequently does, especially as the piece gets smaller. Eventually the ice shell cracks and the process can repeat.
@obillyify It can be handled safely in small quantities or for short periods of time. After that it isn't too exciting, a cold burn which can lead to frostbite.
It can be found in all layers of the atmosphere (although only sparingly in the exosphere), but where it diffuses to has only a minor impact on its behavior as a greenhouse gas.
Wow man cool, Ive been through Russia before, I live over in Erie, Pa. I also have been doing some research on dry ice myself the past week, and I am pretty much sure I know how to build a homemade smoke machine. I have built the actual machine, I just cant seem to find a place to buy the dry ice. Would you know where I could find some? Also, I was wondering which would cause more of a smoke effect, big chunks or tiny pieces? I would think tiny pieces because it has more surface area, right?
Nice vid bro. Scooby Doo taught me this (Ghost of Red Beard). Had to come here & check your video out
it was 7 years ago
@mrericsully Yeah because it tasted like tonic water when we consumed it.
Whats the water thats made when the dry ice evaporates???? bc i drank some with my friend at school one time...
Greenhouse gases trap infrared (heat) light and not visible light.
As far as being heavier than air it is, but that doesn't mean that it can't diffuse/effuse.
That makes sense considering the temperature of the dry ice itself is colder (or has more lack of heat)than the frozen state of Water. However what if there was more water than Dry Ice? I think I know where we are going with this but I want to be sure?
Hi there I’m a magician and have an idea for this in a magic trick. Basically I wanna do a trick whereby you show an empty wine glass you put a cloth over the glass and there when you remove the glass there’s smoke in the glass. So obviously my thinking is a tiny bit of water in the glass and say a few scrapings/shavings of dry ice that get dropped in the glass as you put the cloth over the glass. Would this work with a small amount of water and dry ice?
will the dry ice melt in the water or will it go all night?
@receivejesusnow I've never heard of that being done, but it sounds like you are describing dry ice.
When there is more water than dry ice, i've found the freezing issue to be a bigger problem because it is easier for th gas to get trapped and encapsulated in the water ice.
@BionicleFreek99 Dry ice doesn't melt, it sublimes which means it goes straight from solid to gas. The rate of sublimation in the water is usually faster because water coming so close to its surface causes it to warm up all over versus limited contact with gases in the air.
Pieces this small will not go all night and there is a problem with putting dry ice in water- eventually the dry ice cools the water around it enough to form water ice around it which actually slows the rate of sublimation.
does that carbonate the water? is it safe to drink after?
It does carbonate the water, although I would never drink from my lab glassware. Furthermore, it is not very carbonated because CO2 does not dissolve very well in water at normal pressure. Most carbonated drinks are bottled at higher pressures to force extra CO2 into solution. Having said all of that, one of my favorite things to do is to get a couple of bottles of fruit juice and pour some into extra pitchers to avoid overflow, then toss some dry ice in each of the original bottles and the pitchers to make sparkling juices. They go flat quick though, and of course don't put the lids back on the original bottles or you might explode the bottle.
Sully Science Thanks for the detailed answer. Doesn't seem stable enough for it to be a normal thing to do.
you can drink it. it tastes bad though
Due to liability issues I cannot tell you where to get dry ice, but a simple internet search would probably turn up suppliers and other venues.
And yes, tiny pieces=large surface area= more fog. The only issue with this is that the fog is slow to be generated without the addition of water, but tiny picese will freeze water around themselves and become encapsulated which can cause them to stop giving off fog temporarily until the gas pressure can crack the ice.
@receivejesusnow Usually from the release of high pressure CO2. I don't make mine I purchase it or have it donated from a local yogurt making plant.
If carbon dioxide is described as a colorless, odorless, heavier than air gas, how does it form a greenhouse gas?
There's always that dork "funny" student... sheesh.
what is the gas fog made up of?
+Krish Kothari The gas is carbon dioxide which is cold and expanding [therefore cooling more] which condenses water vapor from the air forming the fog. It is the water droplets that you see, since both water vapor and carbon dioxide are colorless gases.
cool
Interesting. I'm trying to find a way to incorporate something like dry ice into a liquid-cooled computer setup for overclocking (artificially cooling the components of the computer so I can increase the voltage on the chips and make it run faster), so I can have a low-maintenance solution to the problem. With normal liquid cooling, I don't have to bother with anything except for changing out the liquid once every six months, but for a high-end system running over 1000 watts that's not enough cooling. I guess dumping a cube of dry ice into the sealed water reservoir is out of the question. Maybe having some dry ice around the outsides of the coolant hoses, though I don't know how long those dry ice cubes would last (I guess changing them out once a week would be tolerable).
If the dry ice angle doesn't pan out, I might look to using some small refrigerator components attached to the computer, but that might create more problems than it solves. I think if it was doable, someone else would have done it already.
Dry ice for a computer would be a hell of a stupid idea, its expensive and would not last more than a minute or two. Also the liquid cooling if you buy a closed circuit you wont need to maintain it. As far as the fridge it works the same way as a car and your house a/c. Using the fridge parts would be a bad idea because the evaporator is too big and its not meant to be refilled so you can't change any of the parts without losing all the refrigerant and no way to refill.
Now, if you really want a cold computer the best way I figure would be using a fridge compressor with car a/c hoses, they have connectors for refill kits which you can buy cheap, and the evaporator/condenser from a computer water cooler. While attaching it you would need to make it airtight so the refrigerant doesn't leak. The last thing is a thermometer for room temperature and another for evaporator temperature. Then you would need a micro controller to control the compressor speed, because if the evaporator temp gets below room temp water will condense on it and then drip on your cpu/gpu.
Basically it would be a pain in the ass but if you got the time, money and dual gpus with water cooling isn't good enough for you then go for it.
Vlad Kryukov
Thanks for the input bro, I definitely appreciate you taking the time to list out the bits and pieces. Sounds like it just might work. I'll definitely play around with that.
The summer months are murder here in Turkey, most people's rooms aren't air conditioned (they just use ceiling fans), which is why water-cooling isn't good enough for a 24/7 overclocked computer.
EZ M Try researching phase-change cooling and liquid immersion cooling. They offer some impressive results.
@mrericsully ik it was just sarcasm.
victor luan vlogs
- vlad
i mean 12 years ago
Russia Local School, Russia, OH
My science teacher says that carbon dioxide cannot be a liquid.
First, it isn't a liquid here, it is a solid inside a liquid (water) that is subliming, which means it is going through a phase change from solid to gas, skipping the liquid phase.
Secondly, CO2 can be a liquid, but not under normal atmospheric conditions. However, if you pressurize it, up to about 5 atmospheres, then it does turn into a liquid.
Thank you for taking the time to reply to my comment. I'm sorry that it took so long for me to reply. I will share this with my science teacher. Once again, thank you, and I wish I had you as a science teacher because you seem like your class would be fun!
+Sully Science For how long could be keep a pieces dry ice? is it after limit time become to the gas self?
tom wolf It depends on size and how you store it, but dry ice does have a fairly short shelf life, even if refrigerated and kept insulated.
Sully Science Thanks buddy, I want use it to production co2 gas source but if it has a short time is better for me to buy co2 bottle.