Parahydrogen liquid properties

McCarty, R.D. and Weber, L.A., Thermophysical Properties of Parahydrogen from the Freezing Liquid Line to 5000 R for Pressures to 10,000 psia, Natl. Bur. Stand., Tech. Note 617,1972. 

Richard B. Stewart and Hans M. Roder, Properties of Normal and Parahydrogen, in R. B. Scott, W. H. Denton, and C. M. Nicholls (editors). Technology and Uses of Liquid Hydrogen, The Macmillan Co., New York, 1964, p. 386. 

Normal Hydrogen The information on the properties of hydrogen are probably sufficient for present needs. Measurements for the liquid and for gaseous hydrogen to room temperature with pressures to 200 atm became available from the Ohio State University Laboratory about ten years ago. New measurements from the van der Waals Laboratory in Amsterdam were published in 1959 for temperatures from —175° to +150°C. In addition, recent measurements for parahydrogen by CEL [ ] may be used to calculate normal hydrogen data from the triple point to 100°K. At this time, however, no comprehensive evaluation and compilation of all of these data have been included in published tabulations of normal hydrogen properties. The references cited consider only the older data, most of which were measured over 30 years ago and are not of the same order of precision and accuracy as some of the more recent data. 

Substances considered in a compilation of the thermodynamic properties of refrigerants include hydrogen, parahydrogen, helium, neon, nitrogen, air, oxygen, argon, carbon dioxide, hydrocarbons (e.g. methane, ethane, propane, butane, isobutane, ethylene, and propene), and fluoro-and fluoro-chloro-hydrocarbons. Properties listed include those for the liquid and saturated vapour, superheated vapour, and unsaturated vapour. In addition, pressure-enthalpy, and in some instances pressure-entropy, diagrams are provided. 

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