“…Besides, it can be seen from the equation (39) that the second order virial coefficient is function to an exponential function with the width of the Morse potential and the bond distance of Morse oscillator, while this coefficient is a square function to the depth of the Morse potential. Further applications of the equation of the total pressure derived from this work can be applied to significant molecules and dimers, for instance: the dimer of phosphorus ( Jia et al, 2018 ; Peng et al, 2018 ), the nitrogen gaseous, hydrogen chloride, carbon monoxide, hydrogen sulphide, and Bohr fluoride ( Jia et al, 2019 ; Jiang et al, 2019 ; Wang et al, 2019 , and Jia et al, 2020 ), and for water ( Wang et al, 2021 ), where we can use the fittings parameters resulted from the previous studies for simulating our equation of state of Morse oscillator for further numerical results.…”