Explain how CO2 is able to control fires.


  1. Carbon dioxide is the best fire extinguisher to put out a fire caused by inflammable materials like oil and petrol and electrical equipment. Carbon dioxide is heavier than air and it covers the fire and cuts off the supply of oxygen and puts out the fire.
  2. It is stored at high pressure as a liquid in cylinders. When released from the cylinder, carbon dioxide expands enormously in volume and cools down. Carbon dioxide not only forms a blanket around the burning substance, but it also cools down the burning substance.

[Extra information: Ignition temperature is the lowest temperature at which a substance catches fire. Ignition temperature is different for different substances.

For example; LPG, petrol, natural gas, etc. catch fire at very low temperature and thus have low ignition temperature,

Wood, coal, etc. have high ignition temperatures.

LPG and petrol catch fire at very low temperatures and thus have low ignition temperatures, while wood and coal have high ignition temperatures.]

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Simply Easy Learning

Updated on: 16-Mar-2023

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