Methane

Chemical, Physical and Thermal Properties of Methane - CH4

Chemical, physical and thermal properties of Methane - CH4 :

Molecular Weight 16.044
Specific Gravity (gas related to air) 0.554
Specific Volume (ft3/lb, m3/kg) 24.2, 1.51
Density of liquid at atmospheric pressure (lb/ft3, kg/m3) 26.3, 421
Absolute Viscosity (lbm/ft s, centipoises) 7.39 10-6, 0.011
Sound velocity in gas (m/s) 446
Specific Heat - cp - (Btu/lboF or cal/goC, J/kgK) 0.54, 2260
Specific Heat Ratio - cp/cv 1.31
Gas constant - R - (ft lb/lboR, J/kgoC) 96, 518
Thermal Conductivity (Btu/hr ft oF, W/moC) 0.02, 0.035
Boiling Point - saturation pressure 14.7 psia and 760 mm Hg - (oF, oC) -259, -161.7
Latent Heat of Evaporation at boiling point (Btu/lb, J/kg) 219.2, 510000
Freezing or Melting Point  at 1 atm (oF, oC) -296.6, -182.6
Latent Heat of Fusion (Btu/lb, J/kg) 14, 32600
Critical Temperature (oF, oC) -116, -82.3
Critical Pressure (psia, MN/m2) 673, 4.64
Critical Volume (ft3/lb, m3/kg) 0.099, 0.0062
Flammable yes
Heat of combustion (Btu/ft3, Btu/lb, kJ/kg) 985, 2290, -
  • values at 25oC (77oF, 298 K) and atmospheric pressure

Related Topics

  • Material Properties - Material properties - density, heat capacity, viscosity and more - for gases, fluids and solids

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