| Gas |
Argon |
Carbon Dioxide |
Helium |
Neon |
Nitrogen |
Oxygen |
| Atomic or Molecular Weight |
39.948 |
44.01 |
4.0026 |
20.183 |
28.013 |
31.999 |
| Normal Boiling Point (nbp) |
°F |
-302.6 |
-109.3* |
-452.1 |
-410.9 |
-320.4 |
-297.3 |
| Freezing Point |
°F |
-308.9 |
-109.3 |
– |
-415.5 |
-346 |
-361.8 |
| Triple Point (tp) |
°F |
-308.9 |
-69.8 |
– |
-415.5 |
-346 |
-361.8 |
| psia |
10 |
75.2 |
– |
6.3 |
1.8 |
0.022 |
| Critical Point |
°F |
-188.1 |
87.9 |
-450.3 |
-380 |
-232.5 |
-181.1 |
| psia |
710 |
1071 |
33.2 |
395 |
493 |
737 |
| Density |
Gas, NTP |
lb/ft3 |
0.1034 |
0.1144 |
0.01034 |
0.05215 |
0.07245 |
0.08281 |
| Gas, STP |
lb/ft3 |
0.1114 |
0.1234 |
0.01114 |
0.05618 |
0.07805 |
0.08921 |
| Vapor, nbp |
lb/ft3 |
0.363 |
– |
1.04 |
0.596 |
0.287 |
0.279 |
| Liquid, nbp |
lb/ft3 |
86.98 |
63.36** |
7.798 |
75.35 |
50.46 |
71.27 |
| Specific Heat, Cp, Gas, NTP Btu/lb °F |
0.125 |
0.2 |
1.25 |
0.246 |
0.247 |
0.22 |
| Specific Heat Ratio, Cp/Cv, Gas, NTP |
1.67 |
1.31 |
1.66 |
1.66 |
1.41 |
1.4 |
| Heat of Vaporization, nbp |
Btu/lb |
70.2 |
246.6* |
8.72 |
37 |
85.7 |
91.7 |
| Heat of Fusion, tp |
Btu/lb |
12.7 |
85.6 |
– |
7.1 |
11.1 |
6 |
