Why does dry ice emit white gas?

The temperature of dry ice is very low, and it will absorb the heat in the air and vaporize before entering the water; After being put into water, the water temperature drops rapidly, so the air above the water surface will liquefy when it is cold. Similar to common fog.

Dry ice is solid carbon dioxide, which can be used for fire fighting, cold storage of food, cleaning up dirt of industrial equipment, artificial rainfall and so on. Let's talk about why dry ice is white.

0 1 dry ice is solid carbon dioxide, which is condensed into colorless liquid under the pressure of 6250.5498 kPa, and then rapidly solidified under low pressure. The temperature of dry ice is much lower than that of water, so it is equivalent to heating dry ice, which absorbs heat and sublimates, reducing the temperature of water and even freezing it.

The history of dry ice can be traced back to 1823 Faraday and Derby in England. They liquefied carbon dioxide for the first time, and then Chiroli of Germany successfully produced solid carbon dioxide at 1834. But it was only used for research at that time and was not widely used.

The temperature of dry ice is very low, and it will absorb the heat in the air and vaporize before entering the water; After being put into water, the water temperature drops rapidly, so the air above the water surface will liquefy when it is cold. Similar to common fog. Therefore, the "smoke" here is actually a fog composed of vaporized CO2 and liquefied H2O (water vapor), not smoke.