Heat capacity of liquids: An approach from the solid phase
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In this article, the authors calculate the energy and heat capacity of a liquid on the basis of its elastic properties and vibrational states, and show that transverse phonons cannot be excited in the low-temperature limit.Abstract:
We calculate the energy and heat capacity of a liquid on the basis of its elastic properties and vibrational states. The experimental decrease of liquid heat capacity with temperature is attributed to the increasing loss of two transverse modes with frequency $\ensuremath{\omega}l1/\ensuremath{\tau}$, where $\ensuremath{\tau}$ is liquid relaxation time. In a simple model, liquid heat capacity is related to viscosity and is compared with the experimental data of mercury. We also calculate the vibrational energy of a quantum liquid, and show that transverse phonons cannot be excited in the low-temperature limit. Finally, we discuss the implications of the proposed approach to liquids for the problem of glass transition.read more
Citations
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References
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TL;DR: In this article, the authors present a mathematical model for time-dependent correlation functions and response functions in liquid solvers, based on statistical mechanics and molecular distribution functions, and show that these functions are related to time correlation functions in Ionic and Ionic liquids.
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