Melting is a phase change, and there are three primary phases in which matter can exist, including solids, liquids, and gas. When a solid substance becomes liquid, this occurrence is called melting or fusion, and for a substance to melt, energy must be provided. This energy can be delivered as heat or pressure.
The temperature at which a solid becomes liquid is called its melting point. For example, when ice or snow melts, it turns into liquid, and butter melts in a hot pan, which also becomes liquid. Dissolving, on the contrary, is not a phase change. The material being dissolved is called a solute, and the manner it is dissolved in is called a solvent.
Dissolving is when a liquid solute or stable solute compound dissolves to create a solution through a solvent, and an example is a coffee powder, a solid solute, and hot water, a solvent. When the coffee powder is mixed in hot water, it forms a solution, which is the coffee drink. When the coffee powder is blended in hot water, it creates a solution.