Cohesive force- The force of attraction between similar molecules is known as cohesive force.

Adhesive force- The force of attraction between dissimilar molecules is known as adhesive force.

Difference between Cohesion Force and Adhesion Force

Cohesion and adhesion forces are two essential concepts in the field of physics and chemistry that describe the attractive forces between molecules or particles. Although both forces involve attraction, they have distinct characteristics and play different roles in various phenomena. Let's delve into the details of each force and understand their differences.

Cohesion Force:
Cohesion force refers to the attractive force between molecules or particles of the same substance. It occurs due to the interaction between the molecules' charges or the dipole moments they possess. Cohesion force is responsible for the formation of drops, bubbles, or any liquid shape and helps maintain the integrity of the substance. Some key features of cohesion force are:

1. Intra-molecular Attraction: Cohesion force acts within the molecules of the same substance, holding them together.
2. Surface Tension: Cohesion force creates surface tension, which is the property of a liquid to minimize its surface area and form droplets.
3. Capillary Action: Cohesion force facilitates capillary action, allowing liquids to flow against gravity in narrow spaces, such as through a capillary tube.
4. Stronger in Liquids: Cohesion force is particularly strong in liquids due to the close proximity and constant movement of molecules.

Adhesion Force:
Adhesion force, on the other hand, refers to the attractive force between molecules or particles of different substances. It occurs due to the interaction between the molecules' charges or the dipole moments they possess. Adhesion force is responsible for the sticking or clinging of different materials or substances. Some key features of adhesion force are:

1. Inter-molecular Attraction: Adhesion force acts between molecules or particles of different substances, causing them to stick together.
2. Surface Adhesion: Adhesion force allows substances to adhere to surfaces, enabling the formation of coatings, films, or layers.
3. Capillary Rise: Adhesion force, combined with cohesion force, causes capillary rise in a narrow tube, where a liquid climbs higher than its actual level.
4. Varies with Materials: Adhesion force strength depends on the nature of the materials involved and their compatibility.

Summary:
In summary, cohesion force is the attractive force between molecules or particles of the same substance, responsible for surface tension and the formation of droplets. Adhesion force, on the other hand, is the attractive force between molecules or particles of different substances, responsible for sticking and adhesion. While cohesion force acts within a substance, adhesion force acts between different substances. Both forces play significant roles in various natural phenomena and are crucial for understanding the behavior of liquids and solids.