Question

explain surface energy morethan 150 words

Answer 1

The molecules on the surface of a liquid are packed due to unbalanced intermolecular forces than the molecules at the center. This means there is a high energy density at the surface of a liquid.

Surface energy can be defined as the energy difference between the bulk of the material and the surface of the material. Surface energy is defined as the surface energy per unit surface area. The surface energy per unit area is identical to the surface tension measured. The units of surface energy are Jm-2

. When the surface energy is provided by an external source, the liquid is said to be bubbling.

Answer 2

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SURFACE ENERGY:

The molecules at the surface experience net downward force in order to bring molecules from the interior to the surface someone has to be done against the intermolecular attractions.
This work done is stored as potential energy of molecules on the surface this extra energy per unit area of the surface is called as surface energy.

It may be also defined as;
"the work done is in increasing the area of the surface film by Unity "
W=T∆A
we can show that the work done in increasing the surface area by Unity is equal to the surface tension T.
therefore T=$\frac{W}{A}$

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