leachman_2009

J. W. Leachman, R. T Jacobsen, S. G. Penoncello and E. W. Lemmon, “Fundamental Equations of State for Parahydrogen, Normal Hydrogen, and Orthohydrogen”, J. Phys. Chem. Ref. Data 38, 721 (2009)

Source record · Catalogue · Review register

DOI: 10.1063/1.3160306

Source kind: fit

Recorded technique: Helmholtz-energy equations of state for parahydrogen, normal hydrogen and orthohydrogen, fitted to thermodynamic data, with ideal-gas parts fitted to statistical-mechanics values.

Materials in structured entries: None recorded.

Dataset quantities: None recorded.

Contents: 0 datasets; 0 formulas.

Curation notes

Identity VALIDATED by the library; its text has 145 unmapped glyphs. No coefficient is transcribed from it: optmat compares CoolProp’s ideal part with the paper’s, and takes the constants and the range below. Pages are pdf pages.

IDEAL GAS AND CONSTANTS (normal hydrogen): R = 8.314472 J/(mol K) (p. 5); the molar mass is not printed (CoolProp and Muzny et al. use 2.01588 g/mol). The ideal-gas part (Eq. 25, p. 11; Table 3, p. 9) is fitted to the values of Woolley (1948), Haar (1961), Kosloff (1974) and Le Roy (1990), with c_p0 uncertain by below 0.1 % (p. 11). Range 13.957-1000 K, 2000 MPa.

AGAINST COOLPROP 8.0.0 (reference key Leachman-JPCRD-2009): the same R and ideal part (computed 2026-09-30).

Recorded bibliographic identity status: VALIDATED. This concerns identification of the source; it does not establish the scientific correctness of its contents.

Datasets

No datasets are recorded.

Formulas

No formulas are recorded.

Corrections

No dataset errata are recorded in this source record.

Formula corrections, where recorded, appear with their formulas above. Curation notes may also discuss corrections or unresolved interpretation. Consult the review register for the checks and decisions.