Question

What is the consequence on melting point for a pure substance with stronger intermolecular forces? Explain.

Answer 1

The rule of thumb is that the stronger the intermolecular forces of attraction, the more energy is required to break those forces. This translates into ionic and polarcovalent compounds having higher boiling and melting points, higher enthalpy of fusion, and higher enthalpy of vaporization than covalent compounds.

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Answer 2

Explanation:

Temperature is proportional to the average kinetic energy of the particles. If the melting point is high, that means a large amount of energy is needed to overcome the strength of intermolecular forces. Likewise, if the melting point is low, it doesn't take that much energy to break free of those attractions.