Abstract
The isochoric temperature derivative of sound velocity, Beyer’s nonlinearity parameter, the isothermal volume derivatives of thermodynamic Grüneisen parameter and isochoric heat capacity and the repulsive exponent of intermolecular potential are shown to be related to the molecular constant representing the ratio of internal pressure to cohesive pressure of liquids. The calculated values are reasonably satisfactory and explain the experimental results on sound propagation data of liquids. The results have been used to develop further understanding of the significance of molecular constant, fractional free volume and repulsive exponent of intermolecular potential in describing various thermoacoustic and nonlinear properties and the anharmonic behaviour with regard to molecular order and intermolecular interactions in liquids.
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Sharma, B.K. Relationship between the molecular constant, isothermal volume derivative of thermodynamic Grüneisen parameter, nonlinearity parameter and intermolecular forces in liquids. Pramana - J Phys 37, 489–496 (1991). https://doi.org/10.1007/BF02846779
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DOI: https://doi.org/10.1007/BF02846779
Keywords
- Molecular constant
- Beyer’s nonlinearity parameter
- fractional free volume
- Grüneisen parameter
- volume expansivity
- sound velocity
- liquids