Carbon di-oxide gas properties Molecular Weight Molecular weight : 44.01 g/mol Gaseous phase Gas density (1.013 bar at boiling point) : 2.814 kg/m3 Specific gravity (air = 1) (1.013 bar and 21 C (70 F)) : 1.521 Specific volume (1.013 bar and 21 C (70 F)) : 0.547 m3/kg Heat capacity at constant pressure (Cp) (1.013 bar and 25 C (77 F)) : 0.037 kJ/(mol.K) Heat capacity at constant volume (Cv) (1.013 bar and 25 C (77 F)) : 0.028 kJ/(mol.K) Ratio of specific heats (Gamma:Cp/Cv) (1.013 bar and 25 C (77 F)) : 1.293759 Viscosity (0 C (32 F) and 1.013 bar) : 0.0001372 Poise Thermal conductivity (0 C (32 F) and 1.013 bar) : 14.65 mW/(m.K) Gas density of the gas phase (1.013 bar and 15 C (59 F)) : 1.87 kg/m3 Solid phase Solid density : 1562 kg/m3 Liquid phase Liquid density : at (-) 20 C or (-) 4 F and 19,7 bar) : 1032 kg/m3 Liquid/gas equivalent (1.013 bar and 15 C (per kg of solid)) : 845 vol/vol Boiling point (Sublimation) : (-) 78.5 C Latent heat of vapourization (1.013 bar at boiling point) : 571.08 kJ/kg Vapour pressure (at 20 C or 68 F) : 58.5 bar Critical point Critical pressure : 73.825 bar Critical temperature : 31 C Critical density : 464 kg/m3 Triple point Triple point pressure : 5.185 bar Triple point temperature : (-) 56.6 C Miscellaneous Concentration in air : 0.03 vol % Solubility in water (0 C (32 F) and 1.013 bar) : 1.7163 vol/vol