loading page

Isobaric Molar Heat Capacity Model for the Improved Tietz Potential
  • +6
  • Edwin Eyube,
  • P Notani,
  • Yabwa Dlama,
  • E Omugbe,
  • Clement Onate,
  • Ituen Okon,
  • G Nyam,
  • Y Jabil,
  • M Izam
Edwin Eyube
Modibbo Adama University of Technology
Author Profile
P Notani
Taraba State Polytechnic Suntai
Author Profile
Yabwa Dlama
Taraba State University
Author Profile
E Omugbe
Federal University of Petroleum Resources Effurun
Author Profile
Clement Onate
Kogi State University
Author Profile
Ituen Okon
University of Uyo
Author Profile
G Nyam
University of Abuja
Author Profile
Y Jabil
University of Jos
Author Profile
M Izam
University of Jos
Author Profile


In this study, the improved Tietz potential was used to describe the internal vibration of a diatomic molecule. With the help of the expression for bound state energy levels, a more generalized equation for the upper bound vibrational quantum number and canonical partition function were obtained for the diatomic system. The obtained partition function was used to derive analytical equation for the prediction of constant pressure (isobaric) molar heat capacity of diatomic molecules. The analytical model was used to predict the constant pressure molar heat capacity data of the ground state CO, BBr, HBr, HI, P2, KBr, Br2, PBr, SiO and Cl2 molecules. The upper bound vibrational quantum number obtained for the molecules are 85, 100, 21, 21, 115, 301, 89, 157, 110 and 67. The computed average absolute deviation are 2.3462%, 1.1342%, 2.3350%, 1.9078%, 0.7268%, 2.4041%, 1.7849%, 1.8989%, 2.5209% and 2.1523%. The present results are in good agreement with available literature data on gaseous molecules.
22 Sep 2022Submitted to International Journal of Quantum Chemistry
23 Sep 2022Assigned to Editor
23 Sep 2022Submission Checks Completed
23 Sep 2022Reviewer(s) Assigned