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4. What is evaporation ? Explain it on the basisofmolecular motion

Answer»

Evaporation is a type of vaporization that occurs on the surface of a liquid as it changes into the gas phase after reaching its boiling point. The surrounding gas must not be saturated with the evaporating substance.As the faster-movingmoleculesescape, the remainingmoleculeshave lower average kinetic energy, and the temperature of the liquid decreases. This phenomenon is also called evaporative cooling. ... Three key parts toevaporation are heat, atmospheric pressure (determines the percent humidity), and air movement.



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