Question

Why do molecules of a liquid lying in the surface film posses extra energy?

Answer 1

heya...

Here is your answer..

molecules on the surface posses more energy because they are less negative then the molecules in the liquid. the molecule which is present in the liquid will be collide by the numbers of molecules this is the reason why the molecule in liquid is more negative and the surface molecules will be collide from only the lower next layer molecules that is why they are less negative, due to the less negativity the surface molecules posses the extra energy.

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Answer 2

Molecules of a liquid lying in the surface film posses extra energy Because,

Surface Tension is the property of fluid which emerges because of the way that the atoms of the fluid at the surface are in an unexpected circumstance in comparison to those in the inside of the fluid. A particle lying inside the fluid is encompassed by different atoms as is pulled in similarly every which way. Consequently, the net power of fascination following up on the particle is zero.  An atom lying superficially is pulled in additional by the particles lying in the greater part of the fluid than by the particles lying above it in the fume stage. A particle lying superficially encounters a net internal fascination. Because of this internal draw on all particles lying superficially, the surface acts as though it were under strain.