Clusterization of water molecules as deduced from statistical mechanical approach |
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Authors: | Volodymyr Krasnoholovets |
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Institution: | 1.Institute of Physics,National Academy of Sciences,Ky?v,Ukraine |
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Abstract: | Using the methods of statistical mechanics we have shown that a homogeneous water network is unstable and spontaneously disintegrates
to the nonhomogeneous state (i.e. peculiar clusters), which can be treated as an ordinary state of liquid water. The major
peculiarity of the concept is that it separates the paired potential into two independent components—the attractive potential
and the repulsive one, which in turn should feature a very different dependence on the distance from the particle (a water
molecule in the present case). We choose the interaction potential as a combination of the ionic crystal potential and the
vibratory potential associated with the elastic properties of the water system as a whole. The number ℵ of water molecules
that enters a cluster is calculated as a function of several parameters, such as the dielectric constant, the mass of a water
molecule, the distance between nearest molecules, and the vibrations of nearest molecules in their nodes. The number of H2O molecules that comprise a cluster is estimated as about ℵ ≈ 900, which agrees with the available experimental data.
Presented at the 2nd International Conference “Physics of Liquid Matter: Modern Problems” (September 2003, Kyiv, Ukraine) |
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Keywords: | Water clusters statistical mechanics PACS (2000) 34 10+x 36 90 f |
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