Question

explain how CO2 is able to control fire​

Answer 1

It cuts fire as it is heavier than oxygen.

• Carbon dioxide is a noncombustible gas that may be used to put out a fire by flooding the area around it with it.
• It does not extinguish the fire directly, but reduces oxygen supply by replacing or displacing it. It encircles the fire and prevents oxygen and fuel from reaching it.
• This is due to the fact that carbon dioxide is heavier than oxygen. The gas is maintained in a liquid form under pressure in fire extinguishers, and it works effectively on some tiny flammable liquids.
• When carbon dioxide is released, it expands dramatically and quickly cools. The temperature drops as a result of this, which aids in the control of the fire.

Answer 2

Carbon Dioxide $CO_{2}$ is often used in fire extinguishers to control accidental fires in trains, offices, etc.

But why?

• We know that for combustion or burning of fire, there is a necessity for oxygen.

• Now, carbon dioxide is heavier than oxygen. So, when bulk of carbon dioxide gas is put near the fire, $CO_{2}$ cuts out the supply of oxygen from the fire by displacing it and making a cover around the fire.

• As a result, the fire doesn't get enough supply of oxygen and eventually extinguishes.

Hope It Helps.