Question

why evaporation different from boiling

Answer 1

Evaporation usually occurs on the surface. Evaporation may occur when the partial pressure of vapor of a substance is less than the equilibrium vapour pressure. Boiling is a phase transition from the liquid phase to gas phase that occurs at or above the boilingtemperature.

Answer 2

Because evaporation held or happen before boiling point and every substance has different boiling point