AI Article Synopsis
- The hydrogen bonding and hydrophobic interactions in water and methanol create nonideal solutions, affecting dynamic and thermodynamic properties based on temperature and concentration.
- The study uses the Stokes-Einstein relation to examine thermal behavior and transport properties, focusing on self-diffusion and viscosity of methanol at molar fractions X = 0.22, 0.5, and 0.7.
- Results indicate that the Stokes-Einstein relation is violated differently according to the concentration of methanol in the solution, in line with mode coupling theory.
Article Abstract
The hydrogen bonding ability of both water and methanol, together with the occurrence of hydrophobic interactions, makes their solutions nonideal. This nonideality is reflected in both dynamic and thermodynamic quantities at different extent depending on temperature and concentration. The thermal behavior in terms of transport quantities is investigated for different methanol molar fractions by using the concepts of the Stokes-Einstein relation. Starting from the pure compounds, we compare self-diffusion and viscosity data as a function of the temperature for methanol molar fractions X = 0.22, 0.5, and 0.7. The results are interpreted within the scenario of the mode coupling theory and show that the Stokes-Einstein relation is violated in a different way depending on the solution concentration.
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| http://dx.doi.org/10.1063/1.5096760 | DOI Listing |
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