Properties of atomic hydrogen
Thermophysical properties for atomic hydrogen (CAS: 12385-13-6). Use the selector below to view properties in different unit systems.
Calculation Conditions
The following state-dependent properties were calculated at these standard conditions.
Temperature
25 °C
Pressure
1.01325 bar
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Open CalculatorIdentification
- AtomsH: 1
- CAS12385-13-6
- FormulaH
- ID12385-13-6
- InChIH
- InChI KeyYZCKVEUIGOORGS-UHFFFAOYSA-N
- IUPAC Nameatomic hydrogen
- Molecular Weight (kg)1.00794
- Phaseg
- PubChem ID5.3625e+6
- SMILES[H]
- Synonyms
Physical Properties
- Acentric factor7.1561e-7
- Critical pressure (bar)22.8495
- Critical temperature (°C)-236.384
- Critical volume (m³/kmol)0.035772
- Dipole moment0
- Melting temperature (°C)-259.14
- Normal boiling temperature (°C)-252.87
State-dependent Properties
- API gravity4885.42
- Compressibility factor1
- Density (kg/m³)0.0411986
- Dynamic viscosity (cP)0.00777492
- Enthalpy of vaporization (mass) (kJ)0
- Enthalpy of vaporization (molar) (kJ/kmol)
- Joule–Thomson coefficient4.2132e-13
- Kinematic viscosity1.8872e-4
- Molar enthalpy (kJ/kmol)
- Molar heat capacity (kJ/(kmol·K))20.7862
- Molar volume (m³/kmol)24.4654
- Parachor
- Poynting correction factor0
- Prandtl number0.545347
- Saturation pressure (bar)1.7977e+303
- Saturation temperature (°C)-249.927
- Solubility parameter
- Specific gravity0.0347831
- Specific heat capacity (kJ/kg·K)20.6224
- Surface tension
- Thermal conductivity0.29401
- Thermal diffusivity3.4605e-4
Safety Properties
- Autoignition temperature (°C)-273.15
- Flash point temperature (°C)-273.15
- Lower flammability limit0.110777
- Upper flammability limit0.213001
Environmental Properties
- Global warming potential
- Ozone depletion potential
Failed Properties:
- Gibbs free energy (kJ/kmol)Failed
- Molar entropy (kJ/(kmol·K))Failed
- Specific enthalpy (kJ)Failed
- Specific entropy (kJ/kg·K)Failed