Solubility is a value that measures the extent of a solute dissolving in a solvent. It determines how much of a solute can be added to the solvent wherein it will still dissolve. For a solid solute, in general, when the temperature of the system increases, the solubility of the solute would increase as well. There is a direct relation between them. Increasing the temperature would mean there would be more energy to dissolve the substance.