* Increased Kinetic Energy: Heat provides energy to the molecules within the crystal. This energy causes the molecules to vibrate and move faster.

* Greater Movement: The increased kinetic energy leads to more frequent collisions between the salt molecules and the surrounding solvent (usually water).

* Faster Dissolution: The more frequent collisions mean that the salt molecules break away from the crystal structure more quickly and dissolve into the solvent.

In essence, heating the salt crystal increases the rate at which it dissolves, which is a form of diffusion.