, Volume 15, Issue 5, pp 407–412 | Cite as

Effective potential for water vapour

  • O M Singh
  • A W Joshi
Molecular Physics


A suitable temperature dependence is introduced into the force parameters of the Lennard-Jones potential by taking the free-energy average of the Rowlinson potential. The resulting temperature-dependent parameters are used to calculate the effective potential, which is plotted for water vapour at a few different temperatures. The temperature-dependence of the second virial coefficient is shown for the cases of temperature-independent and temperature-dependent parameters of which the latter agrees very well with experimental results.


Lennard-Jones potential effective potential second virial coefficient water vapour 


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Copyright information

© Indian Academy of Sciences 1980

Authors and Affiliations

  • O M Singh
    • 1
  • A W Joshi
    • 1
  1. 1.Department of Physics, Institute of Advanced StudiesMeerut UniversityMeerutIndia

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