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Thermochemical Properties: hydrogen cyanide
Standard thermodynamic properties of chemical compounds — standard enthalpies and Gibbs energies of formation, standard entropies and heat capacities (per phase: solid/liquid/gas), plus critical properties, vapor pressures, and enthalpy of combustion from NIST WebBook and CRC Handbook 97th Edition
| compound id | Cp gas J molK (J/molK) | Cp liquid J molK (J/molK) | Hc standard kJ mol (kJ/mol) | Hf standard kJ mol (kJ/mol) | acentric factor (dimensionless) | boiling point C (C) | cas number | critical pressure MPa (MPa) | critical temp K (K) | density kg m3 (kg/m3) | formula | melting point C (C) | molar mass g mol (g/mol) | name | state at 25C | vapor pressure kPa 25C (kPa) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| hydrogen cyanide | 35.9 | 70.6 | -623.2 | 135.1 | 0.41 | 25.6 | 74-90-8 | 5.39 | 456.65 | 687 | HCN | -13.3 | 27.026 | Hydrogen Cyanide | liquid | 98.8 |
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