The main difference between boiling point and melting point is that the melting point is defined as the temperature at which solid and liquid phases are in equilibrium, whereas the boiling point is the temperature at which the vapour pressure of a liquid is equal to the external pressure. read more
The normal boiling point is defined as the saturation temperature at atmospheric pressure. The boiling point varies only between the triple point and the critical point of the liquid. Melting Point. Melting point is a property of a solid. The melting point is defined as the temperature the solid turns into a liquid. read more