> Are you serious? yes :-) Think about it: why did Saturn V use hydrogen and oxygen? Because burning hydrogen produces more energy by weight than any other c

> Are you serious? yes :-) Think about it: why did Saturn V use hydrogen and oxygen? Because burning hydrogen produces more energy by weight than any other chemical reaction. If putting hydrogen and oxygen together releases the most energy, then splitting water into hydrogen and oxygen would also take the most energy. Any other chemical reaction which yielded H2 would take less energy.