Journal of Thermal Analysis and Calorimetry

, Volume 137, Issue 6, pp 1841–1846 | Cite as

Comments on: Generalization of thermodynamics in of fractional-order derivatives and calculation of heat-transfer properties of noble gases, Journal of Thermal Analysis and Calorimetry (2018) 133:1189–1194

  • I. H. UmirzakovEmail author


It is shown that the equations for pressure, entropy and the isochoric heat capacity obtained by using generalization of the equilibrium thermodynamics in fractional derivatives in the paper mentioned above are approximate, the comparison of the equations with the experimental (tabulated) data for neon and argon made in the paper is incorrect, and the conclusions of the paper made on the basis of the comparison could be incorrect. The conditions for validity of the equations are established. It is also established that the question about a physical sense of the exponent of the derivative of a fractional order is still open.


Thermodynamics Equation of state Entropy Heat capacity Fractional-order derivative 



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© Akadémiai Kiadó, Budapest, Hungary 2019

Authors and Affiliations

  1. 1.Institute of ThermophysicsNovosibirskRussia

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