Question

Explain Why "The stronger the forces of attraction between particles the greater their melting point?"
(use scientific reason)

Answer 1

Answer:

How does the melting point of a substance indicate the strength of its intermolecular force of attraction?

I shall try to reply in most easy, simple way.

The higher the intermolecular forces, the higher the melting point.

Why, to melt these forces must be overcome. MORE heat energy required . The higher tem.

Melting point of indicates the strength of the force of attraction between the particles. On heating a solid, its molecules absorb energy in the form of heat and their kinetic energy increases. ... As the pressure on the substance increases, the melting point decreases.

The heat of fusion (heat required to melt a solid) and heat of vaporization (heat required to vaporize a liquid) are determined by the strength of the Intermolecular Forces. Substances with high intermolecular forces will have higher melting and boiling points. It will require more energy to break the intermolecular bonds.

Decreasing order of bond strength or intermolecular bond is:

Ionic bonds > H bonding > Van der Waals dipole-dipole interactions > Van der Waals dispersion forces.

So the molecules in which ionic bonds are present have high melting point and vice-versa

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