| Absolute
Density, gas @ STP |
1.7841 kg/m3 |
| Thermal Conductivity @ 20
oC |
0.45 cal/(s/cm/oC) |
| Triple
Point Temperature |
-259.2oC |
| Triple
Point Pressure |
53.0 mm/Hg |
| Relative
Density, gas @ STP |
0.0695 (air=1) |
| Critical
Temperatuure |
-239.9 oC |
| Critical
Pressure |
12.80 atm |
| Critical
Volume |
32.242 l / kg |
| Critical
Density |
0.0310 kg / l |
Molecular
Specific Heat
@ 1 atm/26.8oC
|
(cP) 28.851 J/mole oK
(cV) 20.535 J/mole oK |
| Viscosity,
gas @ 1 atm/26.8oC |
0.008957 cP |
| Thermal
Conductivity |
434.3 x 10-6
cal/(s/cm/oC) |
| Latent
Heat of Fusion |
cal/mole |
| Boiling
Point (1 atm) |
-252.8oC |
| Upper l
Point
Temperature |
oC |
| Upper l
Point
Pressure |
mm/Hg |
| Lower l Point Temperature |
oC |
| Lower l Point Pressure |
atm |
| Absolute
Density @ STP |
0.08235 kg/m3 |
| Specific
Volume @ 21.1oC/1atm |
11967.4 l/kg |
| First
Ionization Potential |
15.6 eV |
| Solubility
in H2O @ 20oC |
0.0182 cm3/cm3 |
| Flammability
Limits |
4.0% - 75.0% by volume |
| Autoignition
Temperature |
571.2oC |
