Friday, July 23, 2021

What is the difference between surface and interfacial tension?

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Answer 1

The surface tension at any temperature is the force per unit length (dynes/cm) that has to be applied parallel to the surface to counterbalance the net inward pull of a liquid at the liquid-air interface.  Interfacial tension on the other hand is the tension at the interface of two immiscible liquids.

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