The normal boiling point is the temperature at which the vapour pressure is equal to the standard sea-level atmospheric pressure 760 mm 2992 inches of mercury. Ice cubes start melting and change state from a solid to liquid at the temperature of 0C. Boiling Melting Freezing Anchor Chart A Matter Of Temperature Science Anchor Charts School Science Experiments Elementary Physical Science We know that the melting point and the boiling point can be differentiated on the basis of conversion of the states of matter at the atmospheric pressure. . Boiling point is the temperature at which a substance turns intoa gas while melting point is the temperature at which a substanceturns into a. 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 t...