Acetylene - Thermophysical Properties
Acetylene is a colorless gas widely used as a fuel and a chemical building block. Acetylene is unstable in its purest form. Acetylene is odorless but commercial products normally have a marked odor.
Chemical, physical and thermal properties of Acetylene (Ethyne) - C2H 2:
| Molecular Weight | 26.04 |
| Specific Gravity | 0.90 |
| Specific Volume ( ft3 /lb, m3 /kg ) | 14.9, 0.93 |
| Density of liquid at atmospheric pressure ( lb/ft3, kg/m3 ) | 43.0, 693 |
| Absolute Viscosity ( lbm /ft s, centipoises ) | 6.72 10-6, 0.01 |
| Sound velocity in gas ( m/s ) | 343 |
| Specific Heat - cp - ( Btu/lb oF or cal/g oC, J/kgK ) | 0.40, 1674 |
| Specific Heat Ratio - cp /cv | 1.25 |
| Gas constant - R - ( ft lb/lb o R, J/kg oC ) | 59.3, 319 |
| Thermal Conductivity ( Btu/hr ft oF, W/m oC ) | 0.014, 0.024 |
| Boiling Point - saturation pressure 14.7 psia and 760 mm Hg - ( oF, oC ) | -103, -75 |
| Latent Heat of Evaporation at boiling point ( Btu/lb, J/kg ) | 264, 614000 |
| Freezing or Melting Point at 1 atm ( oF, oC ) | -116, -82.2 |
| Latent Heat of Fusion ( Btu/lb, J/kg ) | 23, 53500 |
| Critical Temperature ( oF, oC ) | 97.1, 36.2 |
| Critical Pressure ( psia, MN/m2 ) | 907, 6.25 |
| Flammable | yes |
| Heat of combustion ( Btu/ft3, Btu/lb, kJ/kg ) | 1450, 21600, 50200 |
- values at 25 oC (77 oF, 298 K) and atmospheric pressure
See also more about atmospheric pressure , and STP - Standard Temperature and Pressure & NTP - Normal Temperature and Pressure ,
as well as Thermophysical properties of: Acetone , Air , Ammonia , Argon , Benzene , Butane , Carbon dioxide , Carbon monoxide , Ethane , Ethanol , Ethylene , Helium , Hydrogen , Hydrogen sulfide , Methane , Methanol , Nitrogen , Oxygen , Pentane , Propane , Toluene , Water and Heavy water, D2O .
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