why can't water split in to H2 and O2 in an enviornment like a car engine so that H2 can used as fue?

Question

in a specially made engine water converts in to hydrogen and oxygen so that hydrogen can be used as fuel.

Answer 1

let's see a similar question:

Why dont carbon dioxide and water form gasoline and oxygen inside our car engine *somehow* so we can burn it afterward?

in a specially made engine carbon dioxide and water convert into octane and oxygen, so that octane can be used as fuel.

Why this doesnt work? Same reason applies to your question. In the above case, we are trying to _create_ energy, that's against the energy conservation law [you cannt create or destroy energy, you can only convert it], which is THE MOST FUNDAMENTAL LAW of physics

I think you are thinking fuel cells. A fuel cell is similar to a battery, differing in that it is designed for continuous replenishment of the reactants consumed. YES, It's more efficient than combustion engine cuz all the reactions are reversible in fuel cells. reversible reaction means more energy could be released, but you have to recharge it with the same amount of energy later on.

Answer 2

To split water into H2 and O2, you need the same amount of energy as you can gain from burning the H2 and O2.

This hydrogen thing is an over-rated topic. It's not an energy source, just a way of storing energy. A new kind of battery. Maybe it will give us better battery than what is currently used for electric cars. But as long as electricity production costs money and causes pollution, it does not solve the problems.

Answer 3

Good idea. They call it the future hydrogen freeway. This is very possible. The problem is the conversion to H2 cars and installing the fueling stations. Production of the H2 is also a challenge. Water is split easily using electricity. The holdup is money, politicians, government and petroleum lobbyists. The science is here.
Get a degree in chemical engineering and maybe you can figure it out.

Answer 4

Well...you **can** split water into oxygen and hydrogen.

The problem is that one expends more energy to break the bond than the energy that could then be generated by the free hydrogen.

Energy questions are rarely whether something can be done. The question is typically whether it makes "energetic sense" to do so :-)

Answer 5

Hydrogen won't help combustion in any respect. that's combusted yet on condition that oxygen is latest. Water is a compound which is composed of the climate hydrogen and oxygen. that's rather hassle-free for a compound to have completely distinctive homes than the climate that that's made out of. yet another occasion is the compound sodium chloride or hassle-free table salt. that's in comparison to sodium (a flammable steel) or chlorine (a risky gasoline) in any respect. Water can cool a hearth, that may positioned it out, yet in that technique it maintains to be as water, albeit probable interior the gaseous state as steam. hearth calls for 3 issues: an oxidizer, in many cases oxygen; something to burn (gasoline) alongside with hydrogen gasoline, or paper, or oil; and ultimately warmth. eliminate any of the three and you place out the hearth.

Answer 6

Because to split water into hydrogen and oxygen, you have to add energy. Burning hydrogen to produce H2O, produces heat energy.

Answer 7

hydrogen and oxygen combine with a strong polar bond
completely meeting eachothers requirements i.e. stable octet

spliting water requires alot of energy and the energy in our environment is far less than that

the easiest way is electrolysis

hope that helped

Answer 8

It TAKES a lot of energy to split water into H and O. That's the problem.

Answer 9

To get H2 and O2 from H2O we need more and more energy
In car engine H2O converts to vapor(just vapor).

Answer 10

Solve that and you would put the oil companies out of business, or sell to them for a few billion dollars ;)
...jj

OMG! I just looked it up....you can!
http://peswiki.com/energy/Directory:Hydrogen_from_Water