Re: Still an error. Energy per volume for liquid hydrogen.
Hydrogen burns in pure oxygen to form water in the following reaction:
2H2 + O2 ---> 2H2O + 483 kJ
Therefore the energy density of hydrogen gas is 241.5 kJ/mol, or 9.874 kJ per Liter. The published density of liquid hydrogen is 0.07 g/mL, which translates into 35 moles per Liter. For combustion with oxygen the corresponding energy density of liquid hydrogen is therefore 8,452.5 kJ per Liter, or 120,750 kJ/kg.
Hope that's all of 'em. Sheesh!