Q:

What is the difference between adhesion and cohesion?

A:

In chemistry, adhesion refers to the tendency of unlike molecules to bond with one another, while cohesion refers to the attractive force between molecules of the same type. Surface tension, which is an essential property of water, illustrates the relationship between adhesion and cohesion.

Know More

Full Answer

The forces of adhesion can be the result of  mechanical or electrostatic forces exerted on two different substances. Meanwhile, cohesive forces are generally  associated with hydrogen bonding and Van der Waals forces, which cause liquids, particularly water, to withstand separation. When water is poured over a glass surface, both adhesive and cohesive forces act on the water. A stronger adhesive force tends to spread the liquid  over the surface, while a stronger cohesive force tends to form water droplets on the surface.

Learn more in Chemistry

Related Questions

  • Q:

    What is the difference between hydrate and anhydrate?

    A:

    In chemistry, the term "hydrate" refers to a substance that contains water, while an anhydrous substance contains no water. Hydrates and anhydrates differ greatly in their reactions to water and their common uses.

    Full Answer >
    Filed Under:
  • Q:

    What is the percent difference formula for chemistry?

    A:

    The percent difference formula for chemistry is expressed as (accepted value - experimental value) / accepted value * 100. Percent difference in chemistry is also called percent error. It is a common calculation that expresses the difference between a measured value and an actual one.

    Full Answer >
    Filed Under:
  • Q:

    What is the basis of a metallic bond?

    A:

    The basis of a metallic bond is the attractive force generated between mobile electrons and fixed metallic atoms with positive charges. Metallic bonds extend over molecular structures while joining metallic atoms with free electrons, transporting heat energy through metals that become conductors of electricity.

    Full Answer >
    Filed Under:
  • Q:

    What is pK in chemistry?

    A:

    In chemistry, pK is the logarithmic value of the dissociation constant, Ka, of a hydrogen atom present on a molecule. A molecule has a distinct pK for each hydrogen atom that can be deprotonated. The acidity of a specific hydrogen atom in a molecule is represented by the pK value.

    Full Answer >
    Filed Under:

Explore