Question

Define melting point of a substance.

Answer 1

The melting point is usually defined as the point at which materials change from a solid to a liquid.

1. The temperature at which a solid changes its state to liquid at atmospheric pressure is called the melting point of that liquid.
2. This is when both liquid and solid phases exist at equilibrium.
3. The substance's melting point also varies with pressure and is specified at standard pressure.