Which hypothesis describes the behavior of molecules when a substance changes from a gas to a liquid? Your
A. The average speed of the molecules increases, because they have lower energy in the liquid state.
B. The average speed of the molecules decreases, because they have lower energy in the liquid state.
C. The average speed of the molecules decreases, because they have higher energy in the liquid state.
D. The average speed of the molecules increases, because they have higher energy in the liquid state.