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- W2790096687 abstract "Thermodynamic properties for a system composed of dipolar molecules are computed. Free energy is evaluated by means of the thermodynamic integration technique, and it is also estimated by using a perturbation theory approach, in which every molecule is modeled as a hard sphere within a square well, with an electric dipole at its center. The hard sphere diameter, the range and depth of the well, and the dipole moment have been calculated from properties easily obtained in molecular dynamics simulations. Connection between entropy and dynamical properties is explored in the liquid and supercooled states by using instantaneous normal mode calculations. A model is proposed in order to analyze translation and rotation contributions to entropy separately. Both contributions decrease upon cooling, and a logarithmic correlation between excess entropy associated with translation and the corresponding proportion of imaginary frequency modes is encountered. Rosenfeld scaling law between reduced diffusion and excess entropy is tested, and the origin of its failure at low temperatures is investigated." @default.
- W2790096687 created "2018-03-29" @default.
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- W2790096687 date "2018-02-27" @default.
- W2790096687 modified "2023-09-27" @default.
- W2790096687 title "Free energy and entropy of a dipolar liquid by computer simulations" @default.
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- W2790096687 doi "https://doi.org/10.1063/1.5008991" @default.
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