[Phil V.]

Has anybody combined the two elements into water using artificial heat?

Yes. I did it in chemistry class . . . "burning" hydrogen produces water. It is an "exothermic reaction". Oxygen and hydrogen give up energy when combined and achieve a more stable state in combination than either "enjoys" in their elemental state.

[William Terrell]

Thanks. I finally get someone to give me a straight answer. I never took chemistry.