Prediction of entropy and Gibbs free energy for nitrogen

[Display omitted] •We present efficient closed-form representations of molar entropy and Gibbs free energy for pure substances.•Present molar entropy and Gibbs free energy prediction models are only involving three molecular constants.•We excellently predict molar entropies and Gibbs free energies f...

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Published inChemical engineering science Vol. 202; pp. 70 - 74
Main Authors Jia, Chun-Sheng, Zhang, Lie-Hui, Peng, Xiao-Long, Luo, Jian-Xin, Zhao, Yu-Long, Liu, Jian-Yi, Guo, Jing-Jing, Tang, Lian-Dong
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 20.07.2019
Subjects
Closed-form representation
Entropy
Gibbs free energy
Nitrogen
Nitrogen injection
Gibbs free energy
Entropy
Nitrogen injection
Nitrogen
Closed-form representation
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Summary:[Display omitted] •We present efficient closed-form representations of molar entropy and Gibbs free energy for pure substances.•Present molar entropy and Gibbs free energy prediction models are only involving three molecular constants.•We excellently predict molar entropies and Gibbs free energies for the N2 gas. Nitrogen (N2) is widely used in oil and gas industry. We report two new efficient closed-form representations for the molar entropy and Gibbs free energy of pure gaseous substances. A comparison of the predicted and experimental values shows that the molar entropies and Gibbs free energies of N2 can be excellently predicted in the temperature range of 100–6000 K. The present entropy and Gibbs free energy prediction models only require the experimental values of three molecular constants and are away from the utilization of a great number of experimental spectroscopy data.
ISSN:0009-2509
1873-4405
DOI:10.1016/j.ces.2019.03.033