Question

What happens to the force of attraction when the melting point of a substance is high?

Answer 1

Step-1

The melting point of a solid is a measure of the force of attraction between its particles.

Step-2

Explanation - When we heat a solid, the molecules of the solid absorb the heat and use it for breaking the force of attraction between them, and also their kinetic energy increases.

1. If the pressure on a substance / solid increases, the melting point will decrease.
2. If the melting point of a substance is higher that means that the molecules of that substance are close to each other due to a strong force of attraction, if we will provide heat to that substance, then the particles are held strongly due to a strong force of attraction.
3. we need to heat the substance at a high temperature so that the molecules break the force of attraction and change its form, we need to heat it at a high temperature to provide more heat, if we provide a low temperature, the heat won't be enough to break forces of attraction.
4. If the melting point of a substance is low, that means the molecules are close to each other but forces of attraction are not that strong, and when we will heat that substance, it will use the heat and will change its form, at even less heating point as that heat will be enough to break the force of attraction.

Step-3

The melting point depends on the force of attraction.
The lesser the force of attraction, the lesser will be the melting point.
The higher the force of attraction, the higher will be the melting point.