Question

how is melting point related to intermolecular forces of attraction? why is latent heat of vaporization is higher than latent heat of fusion?

Answer 1

As solid changes into liquid the intermolecular spaces increases thus the more will be the attraction the more will be the melting point.........

Answer 2

Answer: 1) Melting point is directly related to inter molecular forces of attraction i.e. higher is the inter molecular forces of attraction , higher is the melting point.

Melting point is the temperature at which solid phase is converted into liquid phase.Thus to break the strong molecular forces present in solid, energy has to be supplied in the form of heat which helps to break the forces and molecules gain kinetic energy which overcome the inter molecular forces and thus liquid phase is achieved.

2) Latent heat of vaporization is the amount of heat required to convert 1 gram of liquid into its vapor state without change in its temperature. The latent heat of vaporization of water is 40.67 kJ/mol.

Latent heat of fusion is the amount of heat required to convert 1 gram of solid into its liquid state without change in its temperature. The latent heat of fusion of water is 6.01 kJ/mol.

In fusion or melting,  the molecules just need enough energy to slide around each other, while for vaporization, they need enough energy to completely escape the system. Thus the enthalpy of vaporization is always going to be higher than the enthalpy of fusion.