Molecular weight: 44.01
Melting point (517.97 kPa) : 56.6 ℃
Boiling point (101.325 kPa, sublimation point) : 78.5 ℃
Liquid density (273.15 K, 3485 kpa) : 929.5 kg/m3
Gas density (0 ℃ and 101.325 kPa) : 1.977 kg/m3
Relative density (gas, air = 1, 0 ℃ and 101.325 KPa) : 1.53
Volume (21.1 ℃ and 101.325 kPa) : 0.547 m3 / kg
Gas-liquid volume ratio (15 ℃, 100 kpa) : 845 L/L
Critical temperature: 31.0 ℃
Critical pressure: 7381.5 kPa
The critical density: 468 kg/m3
The compression coefficient
100 kpa1000kpa5000kpa10000kpa
10 0.994010.937770.107370.20291
50 0.996130.960700.781460.42010
Heat of fusion (56.57 ℃ and 518.5 kPa) : 196.65 kJ/kg
Gasification and heat (78.5 ℃ and 101.325 kPa) : 570.08 kJ/kg
Specific heat (100 kpa, 0 ℃) : Cp = 825.64 J/(kg · K)
Cv = 630.96 J/(kg · K)
Specific heat ratio (gas, 20 ℃, 101.325 kPa) : Cp/Cv = 1.316
Vapor pressure (20 ℃) : 1965.7 kPa
(0 ℃) : 3485.6 kPa
(20 ℃) : 5724.9 kPa
Viscosity (100 kpa, 0 ℃) : 0.01373 mPa, S
Surface tension (20 ℃) : 1.16 mN/m
Coefficient of thermal conductivity (100 kpa, 0 ℃) : 0.01645 w/(m K)
Refractive index (gas, 0 ℃ and 101.325 kPa, 5461?) : 1.0004506