Which method is used to change the degree of dispersion of a substance?

The method used to change the degree of dispersion of a substance is heat. When heat is applied to a substance, it can break down intermolecular forces or alter the physical state of that substance, allowing for greater dispersion of particles within a solution or mixture. This process can increase the solubility of substances or emulsify mixtures, leading to a more homogenous solution.

For instance, when you heat a liquid, the increased energy causes molecules to move more rapidly, which can help disperse solids in the liquid or allow gasses to dissolve in a solution more effectively. Similarly, in cooking, heat is often used to dissolve ingredients, integrate flavors, and enhance texture by promoting dispersion.

While cooling a substance may slow down molecular movement, leading to less dispersion, adding water is typically a way to dilute rather than change the degree of dispersion. Beating involves incorporating air into a mixture but does not fundamentally alter the dispersion particle size or interaction in the same way that heating does.