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Compressibility Data for Helium, Nitrogen, and Helium-nitrogen Mixtures At 0 Deg, 25 Deg, and 50 Deg C and At Pressures to 1,000 Atmospheres.

Briggs TC; Howard AR
NTIS: PB 212 481 :194 pages
A special high-pressure burnett-type compressibility apparatus was constructed and used to determine compressibility factors for pure helium, pure nitrogen, and nine helium-nitrogen, mixtures containing 89.47, 79.04, 69.69, 60.09, 49.24, 41.02, 30.99, 20.53, and 10.67 Mole-percent helium. A total of 161 runs were made consisting of 2,355 observed pressures. Data were obtained at 0 deg, 25 deg, and 50 deg c at pressures to 1,000 atmospheres. A power series in the reciprocal volume, commonly called a leiden series, is used to represent the compressibility factors. Three parameters in the series are required to represent helium, five parameters to represent nitrogen, and from three to five parameters to represent the mixtures. Compressibility factors are believed to be accurate to better than 0.1 percent over the entire pressure, temperature, and composition range.
Publication Date
Document Type
IH; Report of Investigation;
Fiscal Year
NTIS Accession No.
NTIS Price
Identifying No.
RI 7639
NIOSH Division
Source Name
NTIS: PB 212 481
Page last reviewed: December 10, 2021
Content source: National Institute for Occupational Safety and Health Education and Information Division