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Acetylene - Thermophysical Properties

Chemical, Physical and Thermal Properties of Acetylene.

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:

Acetylene - Thermophysical Properties
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 .

Related Topics

  • Material Properties

    Properties of gases, fluids and solids. Densities, specific heats, viscosities and more.

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