Why Do More Crystals Dissolve When Water Is Heated?

Heating water can significantly increase the solubility of crystals, a principle that has wide-ranging applications in chemistry, culinary arts, and even everyday household tasks. This article delves into the physical and chemical factors that contribute to this phenomenon, explaining why more crystals dissolve in warmer water.

Increased Kinetic Energy

One of the primary reasons for enhanced solubility is the increase in kinetic energy when water is heated. When water molecules receive more thermal energy, they move faster and with greater intensity. This kinetic energy can help disrupt the ionic or molecular bonds of crystals. As a result, the molecules in the crystal lattice are more easily separated and incorporated into the solution (solvent).

Decreased Viscosity

Heating water also reduces its viscosity