What is sphere if influence, surface tension and surface energy

Sphere of influence

The sphere of influence of a molecule is defined as an imaginary

sphere drawn with the molecule as the centre and radius equal to the range of molecular attraction.

Surface Tension

Surface tension of a liquid is defined as the tangential force per unit length, acting at right angles on either side of an imaginary line drawn on the free surface of the liquid

Surface energy

Surface energy is defined as the extra (i.e., increased) potential

energy of a liquid surface with an isothermal increase in the surface area.