Engineering ToolBox - Resources, Tools and Basic Information for Engineering and Design of Technical Applications!

Acetylene - Thermophysical Properties

Chemical, Physical and Thermal Properties of Acetylene

Sponsored Links

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) - C2H2:

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/lboF or cal/goC, J/kgK) 0.40, 1674
Specific Heat Ratio - cp/cv 1.25
Gas constant - R - (ft lb/lboR, J/kgoC) 59.3, 319
Thermal Conductivity (Btu/hr ft oF, W/moC) 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 25oC (77oF, 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.

Sponsored Links

Related Topics

Related Documents

Tag Search

  • en: acetylene ethyne c2h2
Sponsored Links

Search the Engineering ToolBox

Engineering ToolBox - SketchUp Extension - Online 3D modeling!

3D Engineering ToolBox Extension to SketchUp - add parametric components to your SketchUp model

Add standard and customized parametric components - like flange beams, lumbers, piping, stairs and more - to your Sketchup model with the Engineering ToolBox - SketchUp Extension - enabled for use with the amazing, fun and free SketchUp Make and SketchUp Pro .Add the Engineering ToolBox extension to your SketchUp from the SketchUp Pro Sketchup Extension Warehouse!

Translate this page to
About the Engineering ToolBox!


This page can be cited as

  • Engineering ToolBox, (2008). Acetylene - Thermophysical Properties. [online] Available at: [Accessed Day Mo. Year].

Modify access date.

Customize Ads in the ToolBox

Make ads more useful in Google Ad Settings .

. .


3D Engineering ToolBox - draw and model technical applications! 2D Engineering ToolBox - create and share online diagram drawing templates! Engineering ToolBox Apps - mobile online and offline engineering applications!

Scientific Online Calculator

Scientific Calculator

11 16

Sponsored Links