Basic Hydrogen Properties Download the information in Excel format:  Properties Value Units Auto ignition temperature 500 °C   932 °F Boiling point (1 atm) -252.9 °C   -423.2 °F Density NTP  0.08375…
Contains a comparison of the amount of fuel necessary to provide the same energy unit based on the lower heating values.
Hydrogen Enthalpy at different temperatures and pressures
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Hydrogen Thermal Conductivity at different temperatures and pressures
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Contains lower and higher heating values for hydrogen and various solid, liquid, and gaseous fuels.