Dry Ice Day
Dry Ice is compressed and frozen carbon
dioxide. Dry Ice is liquid if stored at 300psi pressure. From there
it gets fired into a container where it instantly turns into something
resembling snow. The "snow" is then squished down and pressed
together forming solid pallets of dry ice. Thanks Air Liquide!
At normal pressure Dry Ice sublimes at
At that temperature it turns from a solid directly into a gas without
going through any liquid state.
This is very useful if you want to keep your picnic lunch cold without
also having everything saturated with the water left over from normal
ice. When you pick the Dry Ice up from the store, make sure you wind
the window in your car down. CO2 gas from Dry Ice does not support
14 Fun Experiments
with Dry Ice
Hold anything metal down on a piece of Dry Ice and
listen to the metal scream. I think what's happening is the metal
is evapourating a thin layer of gas which pushes the metal up briefly.
The resulting vibration results in the noise.
Place some pieces inside a balloon and hang it from the ceiling with
string. An alternative is to put the balloon in a large container
of water - it blows up faster.
Apparently if you hold a balloon about a foot from your ear then quiet
sounds will be amplified. I'm not sure if this really is the case
or if it's just sound bouncing off the outside of the balloon. Experiment
with two balloons filled with CO2 and normal air. Careful not to have
it explode by your ear.
Film Canister Popping
Place a piece of ice in a film canister on put the cap on. Point the
canister away from people.
Film Canister Engine
Push two holes in the bottom of the canister. Push the holes in at
an angle so they are pointing out like a pinwheel firework. Add the
ice and warm water and hold the canister in the air by trapping a
thread under the lid.
Put some Dry Ice inside a PET (pepsi/coke) bottle with
water. Stop it up with a RUBBER BUNG. Then you can either fire
the bung into the air or find some way of holding the bottle upside
down and the bottle should fly into the air. I definately advise against
holding the bottle while firing rubber bungs around.
Mixture of water, a squeze of ammonia, and some universal indicator.
It will be a nice blue. Add a small piece of dry ice. Adding more
ammonia can make it turn blue again.
Add lots of Dry Ice to a large beaker half full of boiling water still
receiving heat. It makes lots of fog that you can shine lasers through.
You could try sniffing the stuff and note that it does note support
Add Dry Ice to a water bottle with pop-up drinking nozzle (make sure
the nozzle is OPEN at all times!!!). The water/CO2 vapour will be
firing away nicely but then upend the bottle and see what happens
to the water inside the bottle.
Set something on fire then hold it in a stream of carbon dioxide vapour.
Add Dry Ice to a beaker of methylated spirits (denatured alcohol).
The alcohol does not freeze like water would do so the whole thing
becomes a super cooling liquid. Flowers and green leaves will freeze
in just a few seconds and can then be broken and snapped apart.
Add Dry Ice to a beaker of water and detergent...
Icky Milk Bubbles
Add some Dry Ice to a beaker of milk. If there is any left afterwards,
well done. Try tasting it...
Put some dry ice in a large container. Blow
detergent bubbles into the box and watch them float in mid air.