what is main difference between surface tension and tension?
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IN SHORT; SURFACE tension is the property of the liquid in contact with gas phase (usually air). Interfacial tension, on the other hand, is the property between any two substances. It could be liquid-liquid, liquid-solid or solid-air.
Surface and interfacial tension are usually presented by the symbol σ and it is measured by force per unit length. Its SI unit is millinewton per meter (mN/m) which is equivalent to often used cgs unit, dynes per centimeter (dynes/cm).
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The main difference between these two is the places where it occurs. Surface tension is defined to a single liquid surface, whereas the inter facial tension is defined to the interface of two immiscible liquids.
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