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THE QUESTION IS ABOUT INTERFACIAL AND SURFACE TENSION It is given that surface tension is the net downward pull or force if liquid (water) is taken but if two immiscible liquid is taken then what will be the direction of force at the interface. I think it is in both direction please make it clear.

THE QUESTION IS ABOUT INTERFACIAL AND SURFACE TENSION 
 
It is given that surface tension is the net downward pull or force if liquid (water) is  taken but if two immiscible liquid is taken then what will be the direction of force at the interface. 
I think it is in both direction please make it clear. 

Grade:12

2 Answers

Ramreddy IIT Patna
askIITians Faculty 49 Points
9 years ago
At liquid-air interfaces, surface tension results from the greater attraction of water molecules to each other (due to cohesion) than to the molecules in the air (due to adhesion). The net effect is an inward force at its surface that causes water to behave as if its surface were covered with a stretched elastic membrane. Because of the relatively high attraction of water molecules for each other, water has a high surface tension (72.8 millinewtons per meter at 20°C) compared to that of most other liquids. Surface tension is an important factor in the phenomenon of capillarity.

Surface tension has the dimension of force per unit length, or of energy per unit area. The two are equivalent—but when referring to energy per unit of area, people use the term surface energy—which is a more general term in the sense that it applies also to solids and not just liquids.
Suraj Prasad IIT Patna
askIITians Faculty 286 Points
9 years ago
yes it will be in both the directions and these are also known as adhesive forces.

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