Thermodynamic Properties of Argon from the Triple Point to 1200 K with Pressures to 1000 MPa

1989 ◽  
Vol 18 (2) ◽  
pp. 639-798 ◽  
Author(s):  
Richard B. Stewart ◽  
Richard T. Jacobsen
Keyword(s):  
Thermodynamic Properties ◽  
Triple Point

Some Thermodynamic Properties of Pure and Impure Nitrogen

1974 ◽  
Vol 52 (16) ◽  
pp. 1521-1531 ◽  
Author(s):  
J. Ancsin
Keyword(s):  
Thermodynamic Properties ◽  
Triple Point ◽  
Boiling Point ◽  
Normal Boiling Point ◽  
Vapor Pressures ◽  
Freezing Points ◽  
Boiling Points ◽  
Triple Points

Boiling points, freezing points, and vapor pressures (from 56 K to the normal boiling point) for pure and various doped N2 samples have been measured. The normal boiling points for N2 and N2 doped with 100 v.p.p.m. of O2, Ar, Kr, and CO impurities were found to be 77.3439 K, 77.3458 K, 77.3452 K, 77.3454 K, and 77.3444 K respectively. The triple points of the same samples are 63.14635 K, 63.1445 K, 63.14575 K, 63.1487 K, and 63.14675 K respectively. The values obtained for the heats of sublimation, vaporization, and fusion at the triple point of pure N2 were 6773.8, 6049.6, and 724.3 J/mole respectively and the above impurities changed these quantities by the amounts given in Tables 5 and 6.

scholarly journals LOW-TEMPERATURE EQUATION OF STATE OF SOLID METHANE

2016 ◽  
Vol 52 (1) ◽  
Author(s):  
L. N. Yakub ◽  
O. S. Bodiul
Keyword(s):  
Perturbation Theory ◽  
Equation Of State ◽  
Low Temperature ◽  
Thermodynamic Properties ◽  
Triple Point ◽  
Order Approximation ◽  
Zero Order ◽  
Zero Order Approximation ◽  
Temperature Equation ◽  
Solid Methane

The theoretical equation of state for solid methane, developed within the framework of perturbation theory, with the crystal consisting of spherical molecules as zero-order approximation, and octupole – octupole interaction of methane molecules as a perturbation, is proposed. Thermodynamic functions are computed on the sublimation line up to the triple point. The contribution of the octupole – octupole interaction to the thermodynamic properties of solid methane is estimated.

The Percus–Yevick approximation near the triple point of argon

1969 ◽  
Vol 47 (23) ◽  
pp. 2709-2713 ◽  
Author(s):  
R. O. Watts
Keyword(s):  
Distribution Function ◽  
Perturbation Theory ◽  
Thermodynamic Properties ◽  
Radial Distribution Function ◽  
Radial Distribution ◽  
Triple Point ◽  
Triple Point Of Argon ◽  
Experimental Values

The radial distribution function and thermodynamic properties of argon are calculated using the (12, 6) potential and the Percus–Yevick approximation. The results are compared with experimental values for argon, the machine calculations of Verlet and of McDonald and Singer, and with the perturbation theory of Barker and Henderson.

Thermodynamic Properties of Oxygen from the Triple Point to 300 K with Pressures to 80 MPa

1991 ◽  
Vol 20 (5) ◽  
pp. 917-1021 ◽  
Author(s):  
Richard B. Stewart ◽  
Richard T Jacobsen ◽  
W. Wagner
Keyword(s):  
Thermodynamic Properties ◽  
Triple Point

scholarly journals Physical constants of the system methane-hydrogen

1931 ◽  
Vol 130 (814) ◽  
pp. 453-463 ◽  
Keyword(s):  
Critical Temperature ◽  
Thermodynamic Properties ◽  
Triple Point ◽  
Physical Constants ◽  
Modern Work

Isotherms of methane have been determined for a series of temperatures between 0º and 200º C. by Keyes, Smith, and Joubert, and by Keyes and Burks, but, inasmuch as the highest pressure reached at 0º in these researches was 130 atmospheres, and the isotherm as extrapolated from their derived equation did not indicate the expected pv A minimum at about 150 atmospheres ( vide 3), it was deemed advisable to extend the measurements at 0º to 220 atmospheres, and also to determine the isotherm at 20º C. Olszewski was the first to measure the vapour pressures of methane, down to a temperature of –203º C., but his results are chiefly of historical interest. Determinations of the vapour pressures of the liquid between –182º and –150º C. have been made by Stock, Henning, and Kuss, but, apart from a solitary measurement of the triple-point by Crommelin, no modern work seems to have been done on the vapour pressures of the solid. The range between –178º and the critical temperature has been covered by Keyes, Taylor, and Smith in a comprehensive paper upon the thermodynamic properties of methane.

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