Why does solubility of solids and gases change with temperature?

Answer 1

The solubility of solids generally gets higher as the temperature gets higher. (apart from with calcium hydroxide- limewater).

The opposite is true for gases- their solubility decreases as the temperature increases.

Answer 2

At increased temperatures, the speed of the particles within solids, liquids, and gases also increases, and collisions occur more frequently between the solvent and solute molecules. As a result, the molecules have more kinetic energy. This helps to separate the solute molecules from each other, dissolving among the solvent molecules. Although this behavior is more attributable to solids, the predictability of the solubility of solids with respect to temperature is not so easy. For one thing, a certain temperature increase can cause a large increase in solubility for one type of solid, and only a minimal change for others.

Specifically for gases, however, when the kinetic energy of the molecules in a solution increases, a greater number of solute molecules break away from the attraction of solvent molecules, thereby returning to the gas phase. So, at higher temperatures, according to Holt, Rinehart, and Winston's Modern Chemistry, "equilibrium is reached with fewer gas molecules in solution, and gases are generally less soluble."

Answer 3

The solubility of gases increase at low temperature.