Comportement dipolaire de fluides moléculaires jusqu'au point critique I. La polarisation statique
- 1 January 1971
- journal article
- research article
- Published by Taylor & Francis in Molecular Physics
- Vol. 20 (2) , 279-287
- https://doi.org/10.1080/00268977100100261
Abstract
We report here measurements of the static permittivity as a first step in a dielectric study of rotational motion in liquids up to the critical point. The decrease of the static dielectric constant has been measured along the liquidgas coexistence curve for the liquids C6H5Cl, C6H5F, C6H6, CHCl3, CFCl3, CCl4, SCO and CS2. In the discussion we focus our attention on the behaviour of Kirkwood's correlation factor g. Our results confirm its dependence on the steric configuration of the molecule, especially on the orientation of the dipole axis in relation to the shape of the molecule, and show that the value of g for the liquid phase changes with the temperature, approaching unity at the critical point, while its value is unity at all temperatures at the densities of the coexisting vapour.Keywords
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