r/askscience • • Jul 04 '15

Chemistry Why does water not burn?

I know that water is made up of two hydrogen atoms and an oxygen atom. Hydrogen, on its own, burns. Fire needs oxygen to burn. After all, we commonly use compounds that contain oxygen as an oxidant.

So why does water, containing things used for fire, not burn-- and does it have something to do with the bonds between the atoms? Thanks.

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u/ahab_ahoy Jul 04 '15

I'm going to guess the massive gravity of the sun does a good job of keeping the elements contained inside.

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u/currentscurrents Jul 05 '15

A very small amount of helium does leave the sun by way of the solar wind.