. Define cohesive forces. How does its value change for three different states of matter?
Answers
Answer:
cohesive forces are the intermolecular forces( such as those from hydrogen bonding and van der Waka forces) which cause a tendency in liquids to resist separation. these attractive forces exist between molecules of the same substance.
Answer:
Cohesive and adhesive forces are associated with bulk (or macroscopic) properties, and hence the terms are not applicable to the discussion of atomic and molecular properties. When a liquid comes into contact with a surface (such as the walls of a graduated cylinder or a tabletop), both cohesive and adhesive forces will act on it. These forces govern the shape which the liquid takes on. Due to the effects of adhesive forces, liquid on a surface can spread out to form a thin, relatively uniform film over the surface, a process known as wetting. Alternatively, in the presence of strong cohesive forces, the liquid can divide into a number of small, roughly spherical beads that stand on the surface, maintaining minimal contact with the surface.