On approximation of the heat capacity of substances in the gaseous state
| Autor: | I. V. Morozov, G. V. Belov, M. A. Sineva, N. M. Aristova |
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| Rok vydání: | 2017 |
| Předmět: |
Thermodynamic state
Thermodynamic beta Applied Mathematics Thermodynamics General Chemistry Thermodynamic databases for pure substances 010402 general chemistry Thermodynamic equations 01 natural sciences Thermodynamic system 010305 fluids & plasmas 0104 chemical sciences Approximation error 0103 physical sciences Applied mathematics Material properties Mathematics Thermodynamic process |
| Zdroj: | Journal of Mathematical Chemistry. 55:1683-1697 |
| ISSN: | 1572-8897 0259-9791 |
| Popis: | Development of thermodynamic property databases and thermodynamic modeling algorithms require thermodynamic functions of substances presented in a functional form. In this paper we consider substances in the gaseous state only. The most known methods for approximating dependences of the thermodynamic functions on temperature are overviewed. An algorithm is proposed to fit the heat capacity with polynomials splitting the temperature range into intervals where the interval number and boundaries are optimized with respect to a given maximum approximation error. This algorithm is used in the IVTANTHERMO project and the corresponding thermodynamic modeling code. |
| Databáze: | OpenAIRE |
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