Temperature dependence of the surface tension of water by the equilibrium ring method

An experimental investigation of the temperature coefficient of the surface tension of pure water was carried out by the equilibrium ring method. The method, apparatus, and procedure are described in detail. Data of the maximum pull on the ring at 1°C intervals, or less, in the 0°–50°C temperature r...

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Bibliographic Details
Published in:Journal of colloid and interface science 1972-01, Vol.41 (2), p.287-297
Main Authors: Cini, Renato, Loglio, Giuseppe, Ficalbi, Augusta
Format: Article
Language:English
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Summary:An experimental investigation of the temperature coefficient of the surface tension of pure water was carried out by the equilibrium ring method. The method, apparatus, and procedure are described in detail. Data of the maximum pull on the ring at 1°C intervals, or less, in the 0°–50°C temperature range are reported. The precision in the measurements is better than 0.005% of the total pull. The experimental results clearly show that thermal anomalies (“kinks”) are absent at the free surface of pure water. Furthermore, an approximate relationship between maximum pull on the ring and surface tension is discussed. The best-fit equation of the data of the surface tension as a function of temperature is given. Reliable values of the first and second derivatives dγ/ dT and d 2 γ/ dT 2 are evaluated.
ISSN:0021-9797
1095-7103
DOI:10.1016/0021-9797(72)90113-0