Download the information in Excel format: Hydrogen Properties
| Values | Units |
|---|---|
| 500 | °C |
| 932 | °F |
| Values | Units |
|---|---|
| -252.9 | °C |
| -4.23.2 | °F |
| Values | Units |
|---|---|
| 0.08375 | kg/m³ |
| 0.005229 | lb/ft³ |
| Values | Units |
|---|---|
| 0.610 | cm²/s |
| 6.57 E-4 | ft²/s |
| Values | Units |
|---|---|
| 3858.1 | kJ/kg |
| 1659.8 | Btu/lb |
| Values | Units |
|---|---|
| 53.14 | J/g-K |
| 12.70 | Btu/lb-°R |
| Values | Units |
|---|---|
| 2045 | °C |
| 3713 | °F |
| Values | Units |
|---|---|
| 4.0 - 75.0 | vol% |
| Values | Units | |
|---|---|---|
|
J | |
|
Btu |
| Values | Units | |
|---|---|---|
|
kJ/kg | |
|
Btu/lb |
| Values | Units |
|---|---|
| 2.02 |
| Values | Units |
|---|---|
| 0.0696 |
| Values | Units |
|---|---|
| 11.94 | m³/kg |
| 191.3 | ft³/lb |
| Values | Units |
|---|---|
| 14.29 | J/g-K |
| 3.415 | Btu/lb-°R |
| Values | Units |
|---|---|
| 10.16 | J/g-K |
| 2.428 | Btu/ft-h-°R |
| Values | Units |
|---|---|
| 0.1825 | W/m-K |
| 0.1054 | Btu/ft-h-°R |
| Values | Units | |
|---|---|---|
|
g/cm-sec | |
|
lb/ft-sec |
Notes:
[1] NTP (normal temperature and pressure) = 20 oC (68 oF) and 1 atm;
[2] Reference state: Internal Energy U=0 at 273.16 K for saturated liquid; Entropy S=0 at 273.16 K for saturated liquid.
[3] The autoignition temperature depends on hydrogen concentration (minimum at stoichiometric combustion conditions), pressure, and even the surface characteristics of the vessel. Reported figures range from 932-1085 oF according to source [a].
Sources:
[a] ANSI/AIAA G-095-2004, Guide to Safety of Hydrogen and Hydrogen Systems
[b] NIST Chemistry WebBook. http://webbook.nist.gov/chemistry/;
[c] "Hydrogen Fuel Cell Engines and Related Technologies. Module 1: Hydrogen Properties." U.S. DOE. 2001, http://www.eere.energy.gov/hydrogenandfuelcells/tech_validation/pdfs/fcm01r0.pdf.
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