Question

Explain how CO2 is able to control fires.

Answer 1

for combination there r three factors integral for combustion they r oxygen,heat,and fuel.if we can take away any one of em the thing stops burning.
oxygen is essential for burning.by spraying co2, it covers the material like a blanket reducing the oxygen reaching the substance.this will stop combustion

Answer 2

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Carbon dioxide forms a blanket around the fire, cutting off the air supply, due to which the fire gets extinguished.