Question

What happens to water molecules when liquid water changes to water vapor?

A. They break apart into molecules of hydrogen and oxygen, rise into
the air, and then re-form.
B. Oxygen bonds between them break, and the molecules move
freely in the air.
C. They break apart into molecules of hydrogen and oxygen that float
in the air.
D. Hydrogen bonds between them break, and the molecules move
freely in the air.

Answer 1

Step-by-step explanation:

"D. Hydrogen bonds between them break, and the molecules move freely in the air." is the correct answer.

When liquid water evaporates, the hydrogen bonds between the water molecules dissolve, allowing the molecules to travel freely in the air as water vapor. This is referred to as evaporation. Water molecules absorb enough energy to overcome the forces that keep them together as a liquid and transform into a gas. Condensation occurs when water molecules continue to flow freely and randomly in the air as water vapor until they cool down and lose enough energy to form hydrogen bonds again.