The reason why solid carbon dioxide is often called dry ice.

It is generally believed that dry ice was first produced in 1834 by French chemist Charles? The theorists of the World Health Organization published the contents of the first report. In his experiment, he noticed that when the lid of a large bottle of liquid carbon dioxide was opened, most of the liquid carbon dioxide evaporated rapidly. This leaves only solid dry ice in the container. 1924, Thomas? B. Slate applied for a US patent for the commercial sale of dry ice. Later, he became the first successful manufacturer of dry ice as an industry. 1925, in this solid form of carbon dioxide "dry ice", which led to its common name as a trademark by dry ice USA. Commercial, the first substantial sales of dry ice co., ltd. in the same year; Use it for refrigeration purposes.

Artificial rainmaking: Dry ice is sprinkled on the cloud by plane, and the small water droplets in the cloud will freeze into many small ice crystals, so that more water vapor will condense on it, become raindrops and fall to the ground.

Cloud making: Because the temperature of dry ice is very low, the sublimated low-temperature carbon dioxide gas can condense water vapor in the air into small water droplets, so white fog appears, so dry ice is often used to make special effects like clouds in stage performances.

Refrigerant: Because the density of carbon dioxide is higher than that of air, it will stay below the air, so dry ice can still be coated on frozen items after sublimation, which can maintain a good freezing effect, especially for items that need special air freezing.