as we know, hydrogen is highly flammable diatomic gas, and fire needs oxygen to burn. and we all know water is H2O, 2 hydrogen and 1 oxygen. since water has 2 hydrogen and 1 oxygen. why cant fire burn it?
hmm, i am gonna make the first vehicle that burn water by extracting oxygen from the water and leave the flammable diatomic gas. LOL!
2007-11-26 09:17:39 · 6 answers · asked by Bun 4 in Science & Mathematics ➔ Chemistry
thats it, then you can never need to refill, you get back the water. your car can run forever. LOL!
2007-11-26 09:25:19 · update #1
Oxygen in H2O isalready at oxidation state -2. Hydrogen is +1. Because the oxidation state of hydrogen cannot get any higher, water cannot burn. To make H2 from H2O, you would haveto run electricity througth it or react coke with steam at high temperatures. Your fuel costs would be greater than any gain from burning H2 in a car.
2007-11-26 09:24:00 · answer #1 · answered by steve_geo1 7 · 0⤊ 0⤋
Water is a product of combustion, not a reactant.
When oxygen combines with hydrogen, it forms water, and releases energy (the reaction is exothermic). To separate water back into oxygen and hydrogen, you must input at least as much energy as was released during the initial reaction. This separation is generally achieved by a process called "electrolysis".
It is certainly feasible to separate water into oxygen and hydrogen gas, then react the two. You'll just end up with water again, and a bunch of wasted energy.
You cannot burn water, though. It is meaningless to suggest such a thing. Water is basically hydrogen that's already been completely burned (reacted with oxygen).
2007-11-26 17:26:19 · answer #2 · answered by lithiumdeuteride 7 · 0⤊ 0⤋
you answered your own question. Water is in a sense hydrogen ashes. Ever see hydrogen burn?
2007-11-26 17:25:59 · answer #3 · answered by Sid B 6 · 0⤊ 0⤋
because water is already on its oxidized state.
You need extra source of energy to split hydrogen and oxygen of water and allow it to react again.
2007-11-26 17:27:19 · answer #4 · answered by bongnate 3 · 0⤊ 0⤋
What do you think happens when you burn hydrogen gas... you get water.
2007-11-26 17:21:13 · answer #5 · answered by robert 6 · 0⤊ 0⤋
When you combust any kind of hydrocarbon you produce CO2 and water as byproducts, when you combust H2 you produce water as a by product. So because water is a byproduct of these irreversible reactions, its so stable it makes it impossible to ignite.
2007-11-26 17:25:19 · answer #6 · answered by chemicalcajun 4 · 0⤊ 0⤋