liljoe086
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energy density of water
You see many people tring to figure out how to use hydrogen as an alternative means of power. They talk about the energy density of hydrogen vs
gasoline. I would like to know the energy density of 1 gal of water if the water was completely electrolysed (dont care about the energy required to
do it).
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Nerro
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| Quote: | Originally posted by liljoe086
You see many people tring to figure out how to use hydrogen as an alternative means of power. They talk about the energy density of hydrogen vs
gasoline. I would like to know the energy density of 1 gal of water if the water was completely electrolysed (dont care about the energy
required to do it). |
That seems to be the general problem 
2/18 of H2O's mass is hydrogen so complete electrolysis would yield 111.11g of hydrogen and 888.9g of oxygen. Which I estimate to have a volume of
1235L when gaseous at RTP (the hydrogen that is. I have no idea about the oxygen.)
With an energy of combustion of 141.9 MJ/kg that means that the combustion of this hydrogen using the oxygen we also liberated we'd be releasing 15.77
MJ.
[Edited on 13-6-2007 by Nerro]
#261501 +(11351)- [X]
the \"bishop\" came to our church today
he was a fucken impostor
never once moved diagonally
courtesy of bash
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Maya
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yes but he said density , it would be 15.77 Megajoules per Kilogram
whereas he is asking per gallon, correct?
\"Prefiero ser yo extranjero en otras patrias, a serlo en la mia\"
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12AX7
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Well then, 1 gal = 3.78 l = kg H2O. Simple enough to figure out from there.
Tim
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Nerro
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If he can't do it from there he shouldn't be allowed outside the house without supervision...
#261501 +(11351)- [X]
the \"bishop\" came to our church today
he was a fucken impostor
never once moved diagonally
courtesy of bash
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liljoe086
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| Quote: | Originally posted by Nerro
If he can't do it from there he shouldn't be allowed outside the house without supervision... |
They usually dont cuz they know Ill take the world by storm 
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