Question

How do weak intermolecular bond strengths affect the melting and boiling point of a substance? (Picture is of answers I can choose from)

Answer 1

B) Both the melting point and boiling point are lower

This is because weak intermolecular forces need less energy for the forces to break compared to strong intermolecular forces. Less energy required means lower temperatures - low melting and boiling points

Answer 2

For a weak intermolecular bond, both the melting point and boiling point are lower.

A lesser energy is required to break bond of weak intermolecular forces while a greater energy is required to break bond of strong intermolecular forces.

E ∝ T

where;

• E is the energy required to break the bond
• T is the temperature

A lesser energy means a lower temperature and a lower temperature will result in lower boiling point and melting point.

Thus, we can conclude that for a weak intermolecular bond, both the melting point and boiling point are lower.

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