Final answer:
An increase in temperature decreases both the rate of dissolving and the amount of solute that dissolves for most solid, liquid, and gaseous solutes.
Step-by-step explanation:
An increase in temperature decreases both the rate of dissolving and the amount of solute that dissolves for most solid solutes, liquid solutes, and gaseous solutes.
When a solvent is heated, the molecules gain more kinetic energy, leading to an increase in the frequency and force of collisions between the solvent and solute. This results in a faster rate of dissolution. However, for gaseous solutes, an increase in temperature causes the solubility to decrease, as the increased kinetic energy of the gas molecules makes them more likely to escape the attraction of the solvent molecules and return to the gas phase.
Overall, the temperature has a complex effect on the solubility of different types of solutes.