Prediction of enthalpy for nitrogen gas revised

TL;DR

This paper revises the previous analytical expressions for the vibrational partition function and enthalpy of diatomic nitrogen, correcting inaccuracies in earlier work based on the Rosen-Morse potential.

Contribution

It provides corrected analytical formulas for the vibrational partition function and enthalpy of nitrogen gas, addressing errors in prior research.

Findings

Previous formulas were incorrect for nitrogen's vibrational energy spectrum.

Corrected expressions improve accuracy of thermodynamic property calculations.

Highlights the importance of accurate potential models in molecular thermodynamics.

Abstract

It is shown that the energy spectrum of the pure vibrational levels of the molecule consisting of two atoms interacting with each other via the modified Rosen-Morse potential, the analytical expressions for the vibrational partition function and enthalpy of the diatomic molecule, obtained in the paper Prediction of enthalpy for nitrogen gas, M. Deng, C.S. Jia, Evr. Phys. J. Plus 133, 258 (2018), are incorrect.