[Bat_Chemist]

Did you watch part 2 of the video? If so, you saw a bright yellow-orange flame. Do you know why the flame was that color? It wasn’t the burning Hydrogen...it was the sodium from the salt water. Guess what happens after the sodium gives off those yellow photons? It recombines with Chloride and forms salt (just like two H2 and one O2 recombine to form 2 H2O). Tell me, sir, how do you get rid of all that salt? Or are you just going to leave it to build up inside whatever engine is used?

It ends up taking more energy to make the pretty flame than what is produced by that same flame because of all the other things going on.

Let me say it this way: if it takes X amount of energy to go from 2H2O to 4H + 2O, then recombining 4H + 2O to get 2H2O gives off exactly X amount of energy. But that assumes a perfectly efficient reaction chamber. I hope someone can eventually come up with one of those, but thermodynamics laws are notoriously difficult to overcome.

[aruanan]

Let me say it this way: if it takes X amount of energy to go from 2H2O to 4H + 2O, then recombining 4H + 2O to get 2H2O gives off exactly X amount of energy.

Unless, of course, you have a system that reduces the energy required to go in one of the directions. This is why all sorts of chemical reactions that would normally take huge amounts of energy at extremely high temperatures and pressures are able to take place under the relatively mild physiological conditions in the human body.