schmidt_1985
============

R\. Schmidt and W\. Wagner, "A new form of the equation of state for pure substances and its application to oxygen", Fluid Phase Equilib\. 19, 175 \(1985\)

`Source record <https://github.com/LupoLab/optmat/blob/main/src/optmat/data/sources/schmidt_1985.toml>`__ · :doc:`Catalogue </the-data/sources>` · :doc:`Review register </register>`

DOI: `10\.1016/0378\-3812\(85\)87016\-3 <https://doi.org/10.1016/0378-3812%2885%2987016-3>`__

**Source kind:** fit

**Recorded technique:** A method for optimising the structure of a Helmholtz\-energy equation of state, and the resulting equation for oxygen, 54\-300 K and 818 bar\.

**Materials in structured entries:** None recorded.

**Dataset quantities:** None recorded.

**Contents:** 0 datasets; 0 formulas.

Curation notes
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Identity VALIDATED\_WITH\_WARNINGS by the library\. Pages are pdf pages\.

IDEAL GAS AND CONSTANTS\: R = 8\.31434 J/\(mol K\), M = 31\.9988 g/mol; the ideal\-gas part \(Eq\. 15, p\. 11; Table 3, p\. 12\) is that of Wagner, Ewers and Schmidt \(1982\), valid 30\-3000 K, with no uncertainty stated\. The equation's range is 54\-300 K, 818 bar\.

AGAINST COOLPROP 8\.0\.0 \(reference key Schmidt\-FPE\-1985, Stewart\-JPCRD\-1991\)\: CoolProp's ideal part is a refit of this equation, which Stewart et al\. print as their Eq\. \(11\) \(stewart\_1991\)\: within 3\.3e\-6 from 60 K to 1500 K, parting above \(TC\-765\)\.

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

Datasets
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No datasets are recorded.

Formulas
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No formulas are recorded.

Corrections
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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 :doc:`review register </register>` for the checks and decisions.