Statistical Thermodynamics of Ideal Gases
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Thermodynamic properties of ideal gases, well approximated by real gases at a pressure of 1 atm, can be computed from molecular and spectroscopic parameters by the methods of statistical mechanics. For monatomic gases, only the molecular weights are needed. For polyatomic molecules, the fundamental vibrational frequencies and rotational constants , and , usually expressed in wavenumbers (), are also required. The rotational symmetry number is also needed, as well as the electronic degeneracy for the few molecules with non-singlet electronic ground states, such as and NO.
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Contributed by: S. M. Blinder (March 2009)
Open content licensed under CC BY-NC-SA
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Reference: S. M. Blinder, Advanced Physical Chemistry, London: Macmillan, 1969 pp. 438 ff.
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