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The Study of an Ice Premelting Phase in Water-Containing Disperse Media with Dissociating Impurities. P. 107–114

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Section: Physics. Mathematics. Informatics




S.G. Koposov*, G.D. Koposov*, L.N. Shestakov*
*Northern (Arctic) Federal University named after M.V. Lomonosov
Corresponding author: Sergey Koposov, address: Naberezhnaya Severnoy Dviny, 17, Arkhangelsk, 163002, Russian Federation; e-mail:


Studies on ice have considerable advantages due to the low melting point and the low level of thermal fluctuations masking the observation in the substances of a high melting point. The subjects of the study in this article are the frozen discrete structures with dissociating impurities in the water. One of the objectives of the study is to determine the energy of formation of fluctuations. We formulate an experiment theory, based on a study of the temperature dependence of the specific heat capacity on the subsequent release of an additive to the heat capacity of ΔC due to premelting. The activation energy is determined from the mathematical relationship ln (ΔCT2) = f (1/T). The energy of formation of fluctuations ΔЕ decreases when approaching of the impurity concentration to the eutectic point. According to the results of the experimental determination of the temperature dependence of the additive to the specific heat the premelting heating value and the concentration of fluctuations before melting are determined. The number of molecules in the fluctuations of g is determined from ΔЕ = λg, where λ is the melting heat value per one molecule. Numerical analysis of the results (in terms of NaOH) has allowed us to establish the proportion of molecules involved in fluctuations before melting, which was close to the previous results obtained by hydrogen bonds breaking. For the first time we drew attention to the need to distinguish the activation energy in the cooperative process and the activation energy of the process of bonds breaking by certain molecules. A numerical calculation showed that the latter value was close to λ.


premelting, water-containing disperse medium, impurity, calorimetry, specific heat capacity, premelting energy
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