Izvorni znanstveni članak
Characteristics of the P, q, T surfaces of real fluids in the region of solid state densities
M. Ribarič
; J. Stef Institute, E. Kardelj University, 61000 Ljubljana, Yugoslavia
B. Žekš
; J. Stefan Institute and Institute of Biophysics of Medical Faculty; B. Kardelj University, 61000 Ljubljana, Yugoslavia
Sažetak
Evidence is presented for representing the above-critical isothermal pressure density dependence of N2, Xe and propylene fluids by rational functions, say P (q) = A (q, m)/B (q, n), where A and B are m-th and n-th order polynomials in q such that ∂2A/∂q2 = ∂4 A/∂ q4 = ∂2 B/∂q2 = ∂4 B/∂q4 = 0 when q equals critical density qc and certain temperature independent density qef Ε [3 qc, 5qc]. Such isothermal pressure-density representations display first order poles at o = qmax Ε [4 qc, 6qc], implying values for effective diameters of N2 and Xe molecules in agreement with those obtained from effective potentials.
Ključne riječi
Hrčak ID:
327721
URI
Datum izdavanja:
12.1.1981.
Posjeta: 81 *