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Current issue   Ukr. J. Phys. 2015, Vol. 60, N3, p.263-267
doi:10.15407/ujpe60.03.0263    Paper

Bulavin L.A.1, Khrapatyi S.V.1, Makhlaichuk V.M.2

1 Taras Shevchenko National University of Kyiv, Faculty of Physics
(4, Academician Glushkov Ave., Kyiv 03127, Ukraine)
2 I.I. Mechnikov National University of Odessa
(2, Dvoryans’ka Str., Odesa 65026, Ukraine; e-mail: interaktiv@ukr.net)

Calculation of Equilibrium Constant for Dimerization of Heavy Water Molecules in Saturated Vapor

Section: Solid matter
Original Author's Text: Ukrainian

Abstract: The magnitude and the temperature dependence of the equilibrium constant of dimerization of heavy water molecules in saturated vapor in terms of the second virial coefficient of the equation of state have been determined. An expression is found for the equilibrium dimerization constant of water vapor molecules, which contains terms involving the monomer–monomer, monomer– dimer, and dimer–dimer interaction. The obtained results are compared with experimental data. The equilibrium constant of dimerization in heavy water vapor is shown to exceed that in light water vapor within the whole temperature interval.

Key words: dimerization constant, heavy water.