Question

determine whether each statement is true or false.
molecules at the surface of water repel molecules below the surface.
cohesion occurs between the same kinds of molecules.
hydrogen bonds between water molecules cannot be broken.
hydrogen bonding is the cohesive force between water molecules.
water molecules at the surface form hydrogen bonds with only the molecules next to and below them.

Explanation:

• Molecules at the surface of water repel molecules below the surface: Water molecules at the surface are attracted to those below (cohesion), not repelled.
• Cohesion occurs between the same kinds of molecules: Cohesion is the attraction between like molecules.
• Hydrogen bonds between water molecules cannot be broken: Hydrogen bonds in water are relatively weak and can be broken (e.g., when water boils).
• Hydrogen bonding is the cohesive force between water molecules: Hydrogen bonds hold water molecules together (cohesion).
• Water molecules at the surface form hydrogen bonds with only the molecules next to and below them: Surface water molecules form hydrogen bonds with adjacent and below - but not above (as no water molecules above in an open - water surface situation).

Answer:

1. False
2. True
3. False
4. True
5. True