Vapor Pressures of the Inert Gases
A single vapor-pressure relationship applicable from the triple point to the critical point was found to exist for the inert gases argon, krypton, and xenon when the reduced vapor pressure PR is related to TR the reduced temperature. For these inert gases beta = --2.2936 and gamma = - -2.6786 while alpha can be calculated from the boundary condition, alpha + beta + 0.1832 = 0. The vapor-pressure data for helium and neon produced similar reduced-vapor-pressure relationships having different constants. These results are not unexpected in view of the significant quantum effects associated with helium and to a lesser degree with neon. Values calculated with this reduced- vapor-pressure equation were found to be in excellent agreement with experimental values reported for argon, krypton, and xenon. The average deviation for these gases was 0.63%, for neon 1.51%, and for helium 0.79%.
- Research Organization:
- Northwestern Univ., Evanston, Ill.
- Sponsoring Organization:
- USDOE
- NSA Number:
- NSA-15-030657
- OSTI ID:
- 4840973
- Journal Information:
- Journal of Chemical Physics, Journal Name: Journal of Chemical Physics Journal Issue: 3 Vol. 35; ISSN 0021-9606
- Publisher:
- American Institute of Physics (AIP)
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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