Expert: Henry Boyter - 7/31/2006

Question
Sir, this is for no schoolwork or anything related to the subject, I am a senior in highschool and am 17 years old. This question I am about to ask is for an invention I am currently designing in my spare time, and if you must know, my course of study is to become a Machanical Engineer.  I have tried google, and www.ask.com, and all they have given me are the atomic structure and components of Hydrogen which I already know and have studied intently.  
Here is my question:
"In what state does Hydrogen like to form when you first seperate water into Hydrogen and Oxygen and when you seperate the Hydrogen from the Oxygen so the two elements cannot form back into water? Example: Oxygen molecules form into O2 at all altitudes where humans can live, and Nitrogen forms into N3. How would pure Hydrogen form when just extracted from water molecules? Secondly, what is the explosive force of one gram of this Hydrogen molecule?"
Sir, I can assure you that this information will neither be used for a bomb of any sort nor any weapon that would be used to harm anybody/anything.  Sorry if I don't say the name of my invention, but if I give you any hint you will know what it is and know why I choose to keep it secret until I display it.

Answer
Hydrogen forms as H2 (by the way, nitrogen is N2, not N3).  This is a good page to see what happens and shows what the hydrogen can do.

http://en.wikipedia.org/wiki/Electrolysis_of_water

More info here

http://www.theodoregray.com/PeriodicTable/Stories/001.1/

These websites have far more information than I can produce in this format.

Hydrogen has its problems as a fuel.  Storage, flammability, cars to run it are all still problems.  Also, unless the electricity comes from nuclear, you aren't saving much.