* Kinetic Energy: Higher temperatures mean water molecules have more kinetic energy, meaning they move faster and collide more frequently with the salt crystals. This increased collision rate helps break apart the salt crystals and speeds up dissolution.
* Solubility: The solubility of salt (and most solids) increases with temperature. This means that warmer water can hold more dissolved salt than colder water before reaching saturation.
In summary: Hot water dissolves salt faster than cold water due to increased kinetic energy of the water molecules and a higher solubility limit at higher temperatures.