«Proceedings of Gubkin University»

FUNDAMENTAL EQUATIONS OF STATE FOR N-DODECANE AND N-TRIDECANE

UDC: 536.7
DOI: -

Authors:

Keywords: pressure, density, heat capacity, enthalpy, entropy, equation of state

Annotation:

Fundamental 14-constant equations of state of universal form, describing accurately all the thermodynamic properties of n-dodecane and n-tridecane in the temperature range from triple point up to ~700 K at pressures up to 100 Mpa are developed. The average error in the des-cription of the density of the liquid phase on the saturation line is 0,1-0,3 % of the gas phase on the saturation line - 0,3-1,5 %, the saturated vapor pressure - 0,2-1,0 %, the density of the liquid phase at elevated pressures of 0,1-0,4 %, isobaric heat capacity of the liquid phase - 0,4-0,8 %, the speed of sound 0,5-1,0 %. For n-tridecane a fundamental equation is obtained for the first time.

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