Question

which change of state involves a release of energy?
boiling
condensation
melting
sublimation

Explanation:

When a substance changes from a gas to a liquid in condensation, its particles lose energy and come closer together. This process releases energy to the surroundings. Boiling (liquid - gas) and melting (solid - liquid) require energy input. Sublimation (solid - gas) also requires energy to skip the liquid state and go directly from solid to gas.

Answer:

condensation