Abstract
The article describes an experiment of a surface tension on the air ‒ saline interface using a highly sensitive rotating drop method conducted on the SDT tensiometer of the KRUSS company. The surface tension isotherm was estimated at +20 °С in concentrations of 0 to 25 %. The temperature dependency of the surface tension coeffi cient was determined for various concentration readings within the range of +20 to +70 °С. The temperature coeffi cient of the surface tension (α) was estimated as 0.18 mN/(m×K).
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