Abstract
EÖTVÖS1, in 1886, proposed the following equation for liquids 
where γ is surface tension, M is molecular weight, νsp˙ is specific volume and T
c is critical temperature, which is found to be strikingly valid over a wide range of temperature for most non-polar compounds. Even for polar compounds the equation is valid though to a more limited extent; but the value of the constant, K
E, is often very different from the usual value, 2.12. This empirical equation has been given some theoretical support (cf. Partington2). The purpose of the present communication is to point out a simple thermodynamic interpretation of the above equation.
References
Eötvös, Ann. der Physik., 27, 448 (1886).
Partington, J. R., “An Advanced Treatise on Physical Chemistry”, 2, 157 (Longmans, 1951).
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PALIT, S. Thermodynamic Interpretation of the Eötvös Constant. Nature 177, 1180 (1956). https://doi.org/10.1038/1771180a0
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DOI: https://doi.org/10.1038/1771180a0
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