How is boiling point and melting point related?

Answer 1

Boiling points and melting points are temperatures at which change of phase occurs to liquids and
solids. Some substances, such as water, have a TRIPLE POINT temperature at which all three phases (solid, liquid, vapor), exist simultaneously.

Boiling point of a liquid is the temperature at which its phase changes into vapor and the melting point of a solid is the temperature at which it changes state from solid to liquid. The solid and liquid phase of a substance exist in equilibrium at the melting point. The reverse change from liquid to solid is referred to as the freezing point. The freezing point of a substance is often determined by observing the temperature at which a solid begins to change into a liquid, which is actually the melting point, because a characteristic property of some substances is their ability to supercool.

Answer 2

The boiling point and melting point of a substance are both physical properties that relate to the temperature at which a substance changes state. The melting point is the temperature at which a solid turns into a liquid, while the boiling point is the temperature at which a liquid turns into a gas. Both points are influenced by the strength of intermolecular forces in the substance.