ELi5: How water puts out fire if the two components, hydrogen and oxygen, are both highly flammable

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If the two are both highly reactive and easily flammable (like the Hindenburg disaster for example), how do they put out flames? Same question with Sodium and Chlorine, one being highly explosive when it touches water and the other being a deadly gas, but combined they make tasty rocks.

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Anonymous 0 Comments

Water can put out fire not because of some special reaction but just because it stops the oxygen needed for burning from reaching the fire.

To answer your second question, the atoms of the elements when combined become less reactive. On their own, the atoms have free space and they are looking for something to combine with (this can cause dangerous reactions with some other elements). When together, they occupy each other’s ‘free spots’ so they have ‘no desire’ to react with (join with) other atoms.

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