Carbon dioxide in a firm state is called dry ice. One of its interesting properties - the fact that it from a firm phase is sublimated in a gaseous phase, passing liquid. Generally it is applied to cooling of foodstuff in transit, to storage of ice cream in hot weather, etc. In the industry it is received cooling of carbon dioxide at elevated pressure, in living conditions to receive dry ice in the similar way it is quite problematic since the equipment is necessary. But nevertheless, options are.
It is required to you
- The carbon dioxide fire extinguisher, bag from dense fabric, a carbonic acid cylinder, a wire, an adhesive tape.
Instruction
1. Take the fire extinguisher, use only carbon dioxide. On its output bell, put on some sack from dense fabric and reliably to a primotayta its wire or the main thing that it did not fly at release of a stream from the fire extinguisher is possible an adhesive tape.
2. Further, having put the fire extinguisher in action, release three or four streams of carbon dioxide in a bag. Carbon dioxide is in the fire extinguisher under the high pressure and when it leaves it, sharply extends, cooling surrounding space, as a result of it, a part of gas freezing, remains in a bag in the form of dry ice.
3. It is possible to try to receive dry ice, using the carbonic acid cylinder applied to automatic welding semiautomatic devices instead of the fire extinguisher. In the same way to a primotayta a dense bag to the output union of a cylinder and short-term, but sharp turns of the gate pit a little gas in a bag.