Cohesion (chemistry)

In chemistry, cohesion refers to the intermolecular attraction between molecules of the same substance. It is the force that holds molecules together, resulting from various types of intermolecular forces, including hydrogen bonding, van der Waals forces, and dipole-dipole interactions. Cohesion plays a crucial role in determining the physical properties of materials, such as their state (solid, liquid, gas), surface tension, and viscosity.