If pure hydrogen and pure oxygen are both very flammable, why is water not?

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If pure hydrogen and pure oxygen are both very flammable, why is water not?

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If gasoline and air are very flammable why is CO2 not?

If Wood and air are very flammable then why is CO2 and carbon ash not?

The answer to all the above is because the by products of these chemical reactions are very stable substances and are unable to react with other atoms (at least easily).

Water is the result of a chemical reaction between Hydrogen and Oxygen. Oxygen and Hydrogen are both very reactive because the Oxygen Atom and Hydrogen Atom wants to form molecular bonds very strongly.

When these two react they release a lot of energy, this is what creates the heat and light of the flame. But once they have reacted they become incredibly stable.

You need to ADD energy to water to cause it to separate. The textbook example of this is electrolysis where you can apply electricity to water to cause it to separate into Oxygen and Hydrogen.

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