Question

Explain the molecular theory of fusion and vaporization.

Answer 1

Latent heat / By Physics Assignment. Fusion and vaporization in relation to the kinetic theory of matter. Fusion. We explained on page 138 that the molecules of solids vibrate to and fro alternately attracting and repelling one another.

Answer 2

Answer:

Molecular Theory Of Fusion

• The heat energy required to convert 1 mole of solid into a liquid at its melting point is called the enthalpy of fusion. When a liquid freezes, the reverse happens. At some temperature, the motion of the particles is slow enough for the forces of attraction to be able to hold the particles as a solid.

Molecular Theory Of Evaporation

• The phenomenon of evaporation from liquids has long been explained by the kinetic theory, on the assumption that various molecules are moving with different velocities. At any given temperature, the faster moving molecules tend to escape, leaving the remainder on the average slower.