Does the melting point range change as the heating rate changes? if so, is there a direct or inverse relationship? give a reasoned hypothesis to explain your observations.

Melting point range always goes up if there is a heating rate as it represents a direct relationship. The solid or liquid equilibrium do not take place in time as the heating is too rapidly on increase. So the slower heating is more suitable than the higher temperature to melt the compounds thus producing a smaller melting point range.