1. Aug 31, 2006

varsha

hydrogen is a combustible substance and oxygen is a supporter of combustion. but water extinguishes fire. how is that?

2. Aug 31, 2006

Staff: Mentor

Water is the waste product of the combustion you are describing. It has already been burned.

3. Aug 31, 2006

DaveC426913

Uh, yeah. That pretty much covers it.

Water is the "ash" left over from burning hydrogen.

Last edited: Sep 1, 2006
4. Sep 3, 2006

Gokul43201

Staff Emeritus
Varsha: Please look up the definition of a "compound" in your chemistry text.

To others: Something being a combustion product does not mean the thing is immune to further combustion (eg: CO, aldehydes), and that's besides the point here. Furthermore, water is most certainly nothing like an ash. An ash is the uncombusted residue; water is a combustion product.

Last edited: Sep 3, 2006