Temperature dependence refers to how the properties of materials change with temperature. For example, the solubility of a substance in a solvent often increases as the temperature rises, allowing more of the substance to dissolve. Similarly, the conductivity of metals typically improves with higher temperatures, although this can vary depending on the material. In chemical reactions, temperature can significantly affect the reaction rate. Generally, as temperature increases, the kinetic energy of molecules rises, leading to more frequent and energetic collisions. This can result in faster reactions, which is why many processes are conducted at elevated temperatures to enhance efficiency.