The diagram below shows how bent water molecules in solid ice orient themselves with respect to each other. Notice the large openings in the lattice of water molecules.

(a) Discuss why it takes energy to melt ice, and then write a statement that tells what the energy is being used for.

(b) Solid ice floats on top of liquid water. In other words, solid ice is less dense than liquid water. Based on the diagram above, come up with an explanation for why this is so and what must be true about the liquid to make it more dense than the solid.

Transcribed Image Text:

H H 8+ НА -800 18-1