6. Physics of a Fluid, Neutral and Ionized Gases

DENSITY OF PERFLUOROHEXANE NEAR THE EVAPORATION CRITICAL POINT

Sergey V. Stankus
1. Institute of Thermophysics SB RAS Novosibirsk, Russian Federation
stankus@itp.nsc.ru
Rashid A. Khairulin
1. Institute of Thermophysics SB RAS Novosibirsk, Russian Federation
2. Novosibirsk State University Novosibirsk, Russian Federation
Viktor G. Martynets
1. Nikolaev Institute of Inorganic Chemistry SB RAS Novosibirsk, Russian Federation
The material was received by the Editorial Board: 17.08.2012
The density of n-perfluorohexane along the liquid-vapour coexistence curve has been studied by a gamma-ray attenuation technique over the temperature range from 293.83 to 449.18 K. The critical temperature 449.22 ± 0.05 K, the density 613.8 ± 2 kg/m3 , and the critical exponent of coexistence curve 0.349 ± 0.005 were determined. The approximation equations of the temperature dependence of the liquid and vapor phases density were obtained. The results were compared with the data available in the literature. The influence of hydrostatic effect due to the high compressibility of the substance in the vicinity of the vaporization critical point was observed.

Keywords:
critical point, critical parameters, gravitational effect, density, gamma-ray method, liquid, vapor, perfluorohexane.
УДК 536.411+536.412: 547.221

DENSITY OF PERFLUOROHEXANE NEAR THE EVAPORATION CRITICAL POINT
References: Stankus S. V., Khairulin R. A., Martynets V. G., Molorodov Yu. I. DENSITY OF PERFLUOROHEXANE NEAR THE EVAPORATION CRITICAL POINT. Vestnik NSU. Series: Physics. 2013, vol. 8, no. 1. P. 73–77 (in Russ.). DOI: 10.54362/1818-7919-2013-8-1-73-77