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Why water(H2O) don't catch fire? Please Explain.

Dear student!
Water does not burn with fire, because to burn there must be a material which makes a bond with oxygen while the water has already oxygen and is formed by burning hydrogen with oxygen so, there is no more fuel to burn.

Also, the water stops atmospheric oxygen to come in contact with the fire and so the fire also gets extinguished.

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while water has both Oxygen and Hydrogen...

 

an ordinary fire does not have enough energy to crack the molecular bond into combustible components.

 

water poured on a fire inhibits combustion in a few different ways.

if the water completely covers the fire, it displaces oxygen, preventing combustion.

if the water is applied in such a way as to allow it to flash to steam, the process draws heat from the combustion process, which can cool it below the point of combustion.

the cold water itself cools the process, which can cool it below the point of combustion.

in fire suppression activities, the water can also carry additives which inhibit combustion in various ways.

 

if you do crack the molecular bond, and burn the resulting hydrogen and oxygen, the combustion by-product will be water.

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