|
APPENDIX 1:
Physical Properties of Cryogenic Liquids
Properties
|
He
|
H2
|
Ne
|
N2
|
Ar
|
O2
|
CO2
|
Boiling
point(1 atm), K
|
4.2
|
20.3
|
27.1
|
77.3
|
87.3
|
90.2
|
194.7†
|
Critical temperature, K
|
5.2
|
33.0
|
44.4
|
126.3
|
150.9
|
154.8
|
304.2
|
Critical pressure, atm
|
2.2
|
12.8
|
26.2
|
33.5
|
48.3
|
50.1
|
72.8
|
Liquid
density, g/ℓ
|
125
|
71
|
1206
|
808
|
1402
|
1410
|
1560*
|
Gas
density (300 K), g/ℓ
|
0.16
|
0.082
|
0.82
|
1.14
|
1.63
|
1.3
|
2.0
|
Gas/Liquid expansion
ratioat STP (Vg/Vℓ)
|
780
|
865
|
1470
|
710
|
860
|
875
|
790
|
†Sublimation
Point *Solid
at 1 atm
|
|
|