System: hydrogen/helium
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| 1) hydrogen |
| DECHEMA ID | 6234 |
| Formula | H2 |
| Synonym | R 702N |
| Synonym | refrigerant 702 |
| InChi-Key | UFHFLCQGNIYNRP-UHFFFAOYSA-N |
| Registry No. | 1333-74-0 |
| 2) helium |
| DECHEMA ID | 39927 |
| Formula | He |
| Synonym | R 704 |
| Synonym | helium-4 |
| Synonym | o-helium |
| Synonym | p-helium |
| Synonym | refrigerant 704 |
| InChi-Key | SWQJXJOGLNCZEY-UHFFFAOYSA-N |
| Registry No. | 7440-59-7 |
Available physical property data:
| Property | Phase | No. of tables | No. of lines | Data |
| 2nd interaction virial coefficient | gas | 1 | 8 | View |
| 2nd virial coefficient | gas | 2 | 19 | View |
| critical pressure | - | 1 | 11 | View |
| critical temperature | - | 1 | 11 | View |
| density | gas | 1 | 64 | View |
| diffusion coefficient | gas | 2 | 16 | View |
| no azeotrope under specified conditions | - | 1 | 11 | View |
| PVT-data | - | 3 | 27 | View |
| solid-liquid equilibrium | - | 2 | 9 | View |
| sound velocity | gas | 2 | 8 | View |
| thermal conductivity | gas | 9 | 766 | View |
| thermal conductivity | - | 1 | 33 | View |
| vapor-liquid equilibrium | - | 1 | 2 | View |
| vapor-liquid equilibrium, isothermal | - | 23 | 761 | View |
| viscosity, dynamic | gas | 13 | 398 | View |
| viscosity, dynamic | - | 1 | 1056 | View |