Question

A) Derive a relation between surface tension and surface energy of a liquid

Answer 1

surface tension can be defined as the tension on the surface of a liquid due to cohesive force on the molecules of the surface .it results frm d force of attraction between the molecules of liquid 2)surface energy -when the molecule is taken from the inside to the surface layer work is done against the inward resultant force while moving up in a layer .the potential energy of the molecules is inncreased due to this work .this extra energy the surface has is d surface energy .the units of surface energy and surface tension are the same so numerically we can state these 2 quantites are same 

Answer 2

It has no component perpendicular to the horizontal surface. As a result, there is no pressure difference between the liquid side and the vapour side. ... Thus, there is always an excess of pressure on the concave side of a curved liquid surface over the pressure on its convex side due to surface tension.