Prediction of enthalpy for nitrogen gas
Chengdu Yulin High School, 610000, Chengdu, China
2 State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, 610500, Chengdu, China
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Accepted: 5 June 2018
Published online: 16 July 2018
Based on the modified Rosen-Morse oscillator in the description of the internal vibration of a molecule, we propose an explicit representation of molar enthalpy for gaseous diatomic molecule substances. In terms of experimental values of the dissociation energy, equilibrium bond length and vibrational frequency, the molar enthalpy values of the nitrogen gas can be well predicted in the temperature range of 100-6000K from a comparison of theoretically calculated results and experimental data. The present enthalpy calculation model only needs three molecular constants without the need for a large amount of experimental spectroscopy data.
© Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature, 2018