Ask a Teacher

Search



how is dry ice prepared?
Solid carbon dioxide is known as dry ice. It sublimes at –78°C becoming an extremely cold gas.
Materials required:
CO2 fire extinguisher or carbon dioxide tank
    cloth bag
    heavy-duty gloves
    duct tape (optional)
Preparation:
    Put on the heavy duty gloves. !

    Place the nozzle for the fire extinguisher or the CO2 tank inside the cloth bag.

    Either clamp your gloved hand around the mouth of the bag or else tape the bag onto the nozzle. Keep your gloved hand clear of the nozzle.

    Discharge the fire extinguisher or, if you are using a CO2 canister, partially open the valve. Dry ice will immediately begin forming in the bag.

    Turn off the fire extinguisher or close the valve.

    Gently shake the bag to dislodge dry ice from the nozzle. You can remove the bag and use your dry ice!

    Dry ice sublimates quickly, but you can extend how long it lasts by storing the bag in the freezer.



comments powered by Disqus