| Autor: |
Semenov, K. N., Charykov, N. A., Kurilenko, A. V., Keskinov, V. A., Shaimardanov, Zh. K., Shaimardanova, B. K., Kulenova, N. A., Matuzenko, M. Yu., Klepikov, V. V. |
| Zdroj: |
Russian Journal of Physical Chemistry; Apr2020, Vol. 94 Issue 4, p698-703, 6p |
| Abstrakt: |
The temperature of the onset of ice crystallization (∆Т) is determined for binary aqueous solutions of a water-soluble tris-adduct of light fullerene with methionine С60(C5H11NO2S)3 in the temperature range of 272.58–273.15 K. It is found that the bis-adduct concentration varies over a wide range of the mole fraction scale: x = 0.000–7.71 × 10−5 arb. units. Liquidus temperatures are measured using a Beckmann thermometer with a linear scale resolution of ∆T/∆h ≈ 0.01 K/mm. Partial molar excess functions are calculated for H2O. An original semi-empirical VD-AS model is developed to provide a thermodynamic description of such systems. This model is based on a virial expansion of the molar Gibbs energy in terms of mole fractions of components in the solution. Partial molar functions of the bis-adduct are calculated using the VD-AS model. The excess and average total molar Gibbs energies of solutions and gaps in concentration miscibility are calculated. It is concluded that the VD-AS model accurately describes the processes of pre-lamination or microheterogeneous structure formation. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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