I see the above link and will attempt this on time:
See this link for how much hydrogen is in a Gallon of water:http://www.madsci.org/posts/archives/1999-08/934431975.Ch.r.html
So we have about 1 pound of hydrogen per GALLON of water.
So the above link shows 51,591 BTU/LB for Hydrogen. (Using the LHV as it would be in a car)
Now the above link shows the LHV of GASOLINE as 18,659 BTU/LB
To make this apples to apples: One gallon of gasoline is about 6 LB.
Gasoline: 1 gallon = 6 lbs = 111,954 BTU/ gallon (a little off due to rounding)
Water: 1 gallon = 1 lb hydrogen
. 51,591 BTU/ gallon.
So Gallon VS. Gallon Gasoline is 2x water.
In the first post:
" Thermal Heat of Combustion "
" Water / gallon ........... 57,000 BTU'S approx. " - Correct
" Gasoline / gallon ....... 22,800 BTU'S approx. " - Wrong. This is Gasoline / LB, Not GALLON !
Gasoline / gallon = about 122,000 BTU
Hope this clarifies