Question

Water is unique in that it exists in all three states on Earth. Which statement best describes what happens to the energy of the particles when water vapor begins to cool?

A. The average potential energy decreases.
B. The average kinetic energy decreases.
C. The average potential energy remains the same.
D. The average kinetic energy remains the same.

Answer 1

Answer:

B - Average Kinetic Energy decreases

Explanation:

As the water vapor cools the molecules becomes less excited. Less excitement means less movement, hence less kinetic energy