Question

Evaporation is a surface phenomenon. Explain.

Answer 1

Hint: Evaporation is the process by which water changes from a liquid to a gas or vapor. Evaporation is the primary pathway that water moves from the liquid state back into the water cycle as atmospheric water vapor.
Complete answer:

Evaporation is a surface phenomenon because, during evaporation, the molecules with higher kinetic energy dissipate into the air from the topmost layer of the liquid so it is a surface phenomenon. When water is kept in the presence of sunlight, with the increasing duration of time, the temperature of the water increases and the hydrogen bonds of H2O from the surface starts breaking due to which the dissociated molecules move upward. Therefore, evaporation takes place from the surface but not from the inside.

Note: Surface phenomena may be purely physical in nature, or they may be accompanied by chemical transformations; they occur at liquid (highly mobile) and solid interphase boundaries. Surface phenomena related to surface tension and resulting from the deformation liquid boundary surfaces are also called capillary phenomena.