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Properties of Liquids

Properties:

  • Viscosity: internal friction of liquid.
  • Surface Tension: skin on a liquid's surface.
  • Meniscus formation: can be rationalized by contrasting adhesive forces with cohesive forces.

Meniscus Formation

These can be rationalized by contrasting adhesive forces with cohesive forces. The hydroxyl groups on the surface of glass engage in hydrogen bonding with water molecules. These adhesive forces drag the water up the sides of the glass tube. Metallic bonds act between mercury atoms but not between mercury and glass. The metallic bonds between the mercury atoms (cohesive forces) make the mercury "ball up" into a dome shaped meniscus.

Question

In terms of intermolecular forces why does water "bead up" on a newly waxed car?

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