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Acetylene - Thermophysical Properties

Chemical, Physical and Thermal Properties of Acetylene.

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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) - C 2 H 2 :

Acetylene - Thermophysical Properties
Molecular Weight 26.04
Specific Gravity 0.90
Specific Volume ( ft 3 /lb, m 3 /kg ) 14.9, 0.93
Density of liquid at atmospheric pressure ( lb/ft 3 , kg/m 3 ) 43.0, 693
Absolute Viscosity ( lb m /ft s, centipoises ) 6.72 10 -6 , 0.01
Sound velocity in gas ( m/s ) 343
Specific Heat - c p - ( Btu/lb o F or cal/g o C, J/kgK ) 0.40, 1674
Specific Heat Ratio - c p /c v 1.25
Gas constant - R - ( ft lb/lb o R, J/kg o C ) 59.3, 319
Thermal Conductivity ( Btu/hr ft o F, W/m o C ) 0.014, 0.024
Boiling Point - saturation pressure 14.7 psia and 760 mm Hg - ( o F, o C ) -103, -75
Latent Heat of Evaporation at boiling point ( Btu/lb, J/kg ) 264, 614000
Freezing or Melting Point  at 1 atm ( o F, o C ) -116, -82.2
Latent Heat of Fusion ( Btu/lb, J/kg ) 23, 53500
Critical Temperature ( o F, o C ) 97.1, 36.2
Critical Pressure ( psia, MN/m 2 ) 907, 6.25
Flammable yes
Heat of combustion ( Btu/ft 3 , Btu/lb, kJ/kg ) 1450, 21600, 50200
  • values at 25 o C (77 o F, 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, D 2 O .

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Related Topics

  • Material Properties

    Material properties of gases, fluids and solids - densities, specific heats, viscosities and more.

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