How do weak intermolecular bond strengths affect the melting and boiling point of a substance?(1 point)
Responses
Both the melting point and boiling point are lower.
Both the melting point and boiling point are higher.
The melting point is lower, but the boiling point is higher.
The melting point is higher, but the boiling point is lower.
Weak intermolecular bond strengths affect the melting and boiling points of a substance by making them lower.
To understand this concept, we need to consider the role of intermolecular forces in a substance. Intermolecular forces are the forces of attraction between molecules. They can be categorized into three main types: London dispersion forces, dipole-dipole forces, and hydrogen bonding.
Strong intermolecular forces result in higher melting and boiling points because the molecules in the substance are more strongly attracted to each other. This means that more energy is required to break these intermolecular bonds and convert the substance from a solid to a liquid (melting) or from a liquid to a gas (boiling).
On the other hand, weak intermolecular forces result in lower melting and boiling points. In substances with weak intermolecular forces, the molecules are not strongly attracted to each other. As a result, less energy is required to break these bonds and convert the substance from a solid to a liquid or from a liquid to a gas.
Therefore, when the intermolecular bond strengths are weak, both the melting point and boiling point of a substance will be lower. Hence, the correct response is: Both the melting point and boiling point are lower.