When a substance dissolves, heat is added to the compound in the solid state, and it is converted to the liquid state. When a substance melts, as in water, the substance becomes surrounded by solvent molecules, and no heat is added.

Question

Quizplus · Accepted Answer

When a substance melts, heat is added to the substance in the solid state to overcome the intermolecular forces and convert it to the liquid state. The surrounding solvent molecules come into play during dissolution, not melting.

When a Substance Dissolves, Heat Is Added to the Compound