Dry ice is solid carbon dioxide, usually prepared by compressing carbon dioxide gas into a liquid state at low temperatures and then evaporating the liquid carbon dioxide into a solid state.
Here's a simple way to prepare dry ice:
1.Prepare an airtight container, such as a plastic or glass bottle.
2.Add the appropriate amount of liquid carbon dioxide to the container.
3.Seal the container tightly and place it in the refrigerator or freezer.
4.Wait for a few hours until the liquid carbon dioxide has completely evaporated into a solid state.
5.Remove the container, open the lid, and dry ice is obtained.
It is important to note that the temperature of dry ice is very low, about minus 785°C, so care needs to be taken when handling dry ice and avoid direct contact** or the mouth to avoid injury. At the same time, dry ice also needs to be stored at the right temperature and environment to prevent it from sublimating or **.
Dry ice is mainly used as a coolant, such as for refrigerated and frozen foods.
Dry ice can also be used for stage effects, such as in meetings and plays to prepare smoke and special effects.
In general, dry ice is a multi-purpose substance that is used in a wide range of applications in various fields, so it is important to master the preparation technology of dry ice.