lemmon_2006

E. W. Lemmon and R. Span, “Short Fundamental Equations of State for 20 Industrial Fluids”, J. Chem. Eng. Data 51, 785 (2006)

Source record · Catalogue · Review register

DOI: 10.1021/je050186n

Source kind: fit

Recorded technique: Short (twelve-term) Helmholtz-energy equations of state of one functional form for twenty fluids, among them krypton, xenon, nitrous oxide and carbon monoxide, fitted to thermodynamic data.

Materials in structured entries: N2O

Dataset quantities: None recorded.

Contents: 0 datasets; 1 formula.

Curation notes

Identity VALIDATED by the library. Printed pp. 785-850; pages cited are pdf pages.

IDEAL GAS AND CONSTANTS: R = 8.314472 J/(mol K) (p. 5). The ideal-gas heat capacity (Eq. 10, p. 5) is c_p0/R = c0 + sum_k v_k (u_k/T)^2 exp(u_k/T)/(exp(u_k/T) - 1)^2. Krypton: M = 83.798 g/mol, c0 = 5/2 and no Einstein terms, 115.77-750 K, 200 MPa. Xenon: M = 131.293, c0 = 5/2, 161.4-750 K, 700 MPa. Nitrous oxide: M = 44.0128, c0 = 3.5, (v, u/K) = (2.1769, 879.0), (1.6145, 2372.0), (0.48393, 5447.0), 182.33-525 K, 50 MPa. Carbon monoxide: M = 28.0101. No uncertainty of c_p0 is stated.

AGAINST COOLPROP 8.0.0 (reference key Lemmon-JCED-2006): the same M, R and ideal parts; for nitrous oxide Eq. (10) with these constants equals CoolProp’s c_p0 to 2e-16 at 200, 294 and 500 K (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

lemmon_2006/eq10_N2O

{
  "id": "eq10_N2O",
  "material": "N2O",
  "equation": "Eq. (10), p. 5 (pdf); the coefficient table",
  "printed": "c_p0/R = c0 + sum_k v_k (u_k/T)^2 exp(u_k/T)/(exp(u_k/T) - 1)^2",
  "variable": "T in K",
  "range": "182.33-525 K",
  "coefficients": {
    "c0": "3.5",
    "v1": "2.1769",
    "u1": "879.0",
    "v2": "1.6145",
    "u2": "2372.0",
    "v3": "0.48393",
    "u3": "5447.0"
  },
  "check": "CoolProp 8.0.0 equals it to 2e-16 (tests/test_transport.py)."
}

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.