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Article

Thermophysical Properties of Materials
2001. V. 39. № 3. P. 429–438
Gerasimov A.A., Grigor'ev B.A., Kuznetsov M.A.
New generalized equations for the calculation of isobaric heat capacity of hydrocarbons at the saturation curve
Annotation
The experimental data obtained by the authors on the isobaric heat capacity of n-alkanes on the saturation curve in the liquid phase and the literature data on Cp of hydrocarbons representing different homologous series are used to analyze the known formulas recommended for predictions of Cp. It is demonstrated that, in order to increase the accuracy of calculations, one needs, first of all, to refine the description of heat capacity in the vicinity of the temperature of the triple point. The universal behavior of the temperature dependence of Cp in the vicinity of the triple point temperature is revealed. Based on these findings, new generalized equations are developed, which are recommended for the calculation of Cp of hydrocarbons in the temperature range from the triple point to critical.
Article reference:
Gerasimov A.A., Grigor'ev B.A., Kuznetsov M.A. New generalized equations for the calculation of isobaric heat capacity of hydrocarbons at the saturation curve, High Temp., 2001. V. 39. № 3. P. 429