Precautions for using dry ice:
Remember, every time you touch dry ice, you must be careful and use thick cotton gloves or other shelter to touch dry ice! If it is in direct contact with the skin for a long time, it may lead to cell freezing and similar minor or extremely serious burns. Dry ice can not be used in cars, engine rooms and other places, because sublimated carbon dioxide will replace oxygen, which may lead to shortness of breath or even suffocation!
1. Never let children touch dry ice alone! !
The temperature of dry ice is extremely low, please don't put it in your mouth to prevent frostbite! !
3. When taking dry ice, you must use thick cotton gloves, clips and other shelters (plastic gloves have no blocking effect! ! )
Please use dry ice in a well-ventilated place and avoid using it in a closed space with dry ice! !
5. Dry ice cannot be mixed with liquid.
Tip: Use dry ice correctly and safely to avoid injury.
Dry ice is solid carbon dioxide. At the normal temperature and pressure of 6079.8 kPa, carbon dioxide condenses into colorless liquid, then rapidly evaporates at low pressure, and then condenses into compacted ice-like solid matter. Its temperature is-78.5℃, which is dry ice. The cold storage capacity of dry ice is more than 1.5 times that of water ice. After absorbing heat, it sublimates into carbon dioxide gas, which has no residue, toxicity and odor, and has sterilization effect. Directly sublimate after heating and will not liquefy. Dry ice is the solid state of carbon dioxide. Because the temperature of dry ice is very low, the temperature is MINUS 78.5℃, so it is often used to keep objects in a frozen or low temperature state.
At room temperature, when carbon dioxide gas is pressurized to about 10 1325Pa, when a part of steam is cooled to about -56℃, it will freeze into snowflake-like solid carbon dioxide. The gasification heat of solid carbon dioxide is very high, which is 364.5 J/g at -60℃. When it is gasified at atmospheric pressure, the ambient temperature can be reduced to about -78℃ and no liquid will be produced, so it is called "dry ice".