Define surface energy.

Surface energy is defined as the amount of work required to increase the unit area of free surface under isothermal condition. 



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What is sphere of influence?

The vicinity around the iquid molecule within which it's influence can be experienced by another molecule is called as the sphere of influence.
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What is the order of the size of sphere of influence?


The sphere of influence is of the order of 10–7m. 
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What are the units and dimensions of surface tension?

Unit of surface tension:

SI system: N/m
CGS system: dyne/cm

Dimensional formula of surface tension is [M1L0T–2].

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How surface tension is related to surface energy?

The surface energy is dimensionally and numerically equal to surface tension. 
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