Carbon dioxide [ Return towards Standard gases ]
Result of the combination of the carbon and the oxygen, the CO2 is produced by various processes: combustion of coal and hydrocarbons, fermentation of liquids, and breath of the humans and the animals.
The gaseous CO2 has a slightly irritating smell, is colorless and heavier than the air.
It freezes at -78.5°C and forms the dry ice.
It intervenes in a lot applications:
- carbonation of carbonated drinks;
- draft beer;
- food freezing;
- transport under controlled temperature;
- protection of welds against oxidation;
- carbonic snow for fire extinguishers;
- pH controls and regulation of wastewaters;
- pools;
- etc.
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