How do you make dry ice?

Answer 1

To manufacture dry ice, gaseous carbon dioxide (CO2) is first pressurized and refrigerated to form liquid CO2, which is allowed to expand in an atmospheric chamber. When CO2 converts from liquid CO2 to gas, there is an extreme drop in temperature. This causes some of the gas to freeze, yielding both snow-like CO2 and vapor CO2.

Answer 2

Dry ice is made by taking raw CO2 gas, filtering it, cooling it, and pressurizing it. The CO2 gas turns in to liquid CO2 (liquid CO2 can only exist under pressure on earth). When the liquid CO2 is released from pressure, it turns in to dry ice snow. The dry ice snow is smashed together using a block press or pelletizer and then you have dry ice.

Answer 3

The easiest way (not necessarily the safest) is to hold a hessian bag over the outlet from a cylinder of CO2 and open the regulator. The drop in pressure as the gas leaves the bottle is enough to freeze some to make dry ice. Be aware that this is very cold and that co2 is an asphyxiant gas, i.e. it will suffocate you if you don't have adequate ventilation.

Answer 4

Dry ice is easy to get. It is sold at many local stores. Many stores that carry it are places like Walmart, Meijer, grocery stores, and ice cream stores. Call ahead to find out if they carry it. Dry ice should cost between $1-$3 per pound.

Answer 5

I know that you can use a CO2 fire extinguisher. Simply securely tape a fabric bag over the end of the nozzle and release the CO2 from the extinguisher the pressure that builds up in the bag allows the co2 to solidify at temperatures of -78. Take off the bag and you hold have some dry ice. Repeat the process to make more. Remember to always use safety gloves and goggles!!

Answer 6

Dry ice cannot exist in liquid form. At temperatures below −56.4 °C (−69.5 °F) and

pressures below 5.13 atm (the triple point), CO2 changes from a solid to a gas with

no intervening liquid form.

Carbon dioxide has no liquid-phase at pressures less than about 5.1 atmospheres. So

what you have to do it squeeze it with pressure of at least 75 pounds per square inch,

and then, as you change the temperature, you get all three phases ... gas, liquid, and

solid (dry ice).

Answer 7

By quickly decompressing compressed carbon dioxide (CO2), the CO2 freezes itself forming dry ice.

Answer 8

1. Pressurization of carbon dioxide gas

2. Refrigeration of carbon dioxide gas at approx. -80 0C to obtain the liquid

3. Reduction of the pressure to obtain dry ice

Answer 9

freezing carbon-dioxide