As a liquid evaporates, molecules leave from the surface. Which molecules are able to leave, and what happens to the mean kinetic energy of the molecules that stay in the liquid?
- AThe less energetic molecules escape and the average kinetic energy decreases.
- BThe less energetic molecules escape and the average kinetic energy increases.
- CThe more energetic molecules escape and the average kinetic energy decreases.
- DThe more energetic molecules escape and the average kinetic energy increases.