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Principle
The cohesive forces in a liquid generate tension on its surface, the so-called surface tension. A metal ring that is plunged into a liquid is withdrawn from the liquid. At a certain tensile force, the liquid film will be disrupted from the ring. Based on the tensile force and ring diameter, the surface tension of a liquid can be calculated
Benefits
- High sensitivity measurement possible thanks to ring method
- Analogue set-up that can also be used as a demo experiment in the lecture hall
- Interdisciplinary use also in applied sciences or physical chemistry
Task
Examine the surface tension of a liquid.
Learning objectives
- Wetting and non-wetting liquids
- capillarity
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Digital learning
(de) Versuchsbeschreibung
p2140501d .pdf
File size 0.72 Mb
pdf
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(ru) Описание Эксперимента
p2140501r .pdf
File size 0.58 Mb
pdf
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(en) Versuchsbeschreibung
p2140501_en .pdf
File size 0.86 Mb
pdf
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