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Chemical, Physical and Thermal Properties of Propane Gas - C3H8

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Chemical, physical and thermal properties of Propane - C3H8 :

Molecular Weight 44.097
Specific Gravity of gas (air = 1) 1.52
Specific Volume (ft3/lb, m3/kg) 8.84, 0.552
Density of liquid at atmospheric pressure (lb/ft3, kg/m3) 36.2, 580
Vapor pressure at 25oC (psia, MN/m2) 135.7, 0.936
Absolute Viscosity (lbm/ft s, centipoises) 5.38 10-6, 0.0074
Sound velocity in gas (m/s) 253
Specific Heat - cp - (Btu/lboF or cal/goC, J/kgK) 0.39, 1630
Specific Heat Ratio - cp/cv 1.13
Gas constant - R - (ft lb/lboR, J/kgoC) 35.0, 188
Thermal Conductivity (Btu/hr ft oF, W/moC) 0.010, 0.017
Boiling Point - saturation pressure 14.7 psia and 760 mm Hg - (oF, oC) -44, -42.2
Latent Heat of Evaporation at boiling point (Btu/lb, J/kg) 184, 428000
Freezing or Melting Point  at 1 atm (oF, oC) -309.8, -189.9
Latent Heat of Fusion (Btu/lb, J/kg) 19.1, 44400
Critical Temperature (oF, oC) 205, 96
Critical Pressure (psia, MN/m2) 618, 4.26
Critical Volume (ft3/lb, m3/kg) 0.073, 0.0045
Flammable yes
Heat of combustion (Btu/ft3, Btu/lb, kJ/kg) 2450, 21660, 50340
  •  values at 25oC (77oF, 298 K) and atmospheric pressure
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