Fundamental Equations of State for Parahydrogen, Normal Hydrogen, and Orthohydrogen

J. W. Leachman, R. T Jacobsen, and S. G. Penoncello

New fundamental equations of state for parahydrogen, normal hydrogen, and orthohydrogen were developed to replace the existing property models.  To accurately predict thermophysical properties near the critical region and in liquid states, the quantum law of corresponding states was applied to improve the normal hydrogen and orthohydrogen formulations in the absence of available experimental data.

J. Phys. Chem. Ref. Data 38, 721 (2009)

A Fundamental Equation of State for 2-propanol (C₃H₈O) in the Extended Equation of State Format

G. Scalabrin and P. Stringari

A recently proposed method for the regression of a fundamental equation of state for pure fluid is examined. The technique is applied to 2-propanol to derive a dedicated equation of state in a heuristic mode directly from the available experimental data. The model has been validated with data for coexistence states, density, isobaric and isochoric heat capacities, and speed of sound. The obtained results are satisfactory because the proposed equation of state represents the available data within their mean experimental uncertainties.

J. Phys. Chem. Ref. Data 38, 127 (2009)