Question

which process requires the release of energy?
deposition \t sublimation
vaporization \t melting

Explanation:

Step1: Recall phase change energy

Phase changes: deposition (gas→solid), sublimation (solid→gas), vaporization (liquid→gas), melting (solid→liquid). Exothermic (release energy) vs endothermic (absorb energy).

Step2: Classify each process

• Deposition: gas to solid (exothermic, releases energy).
• Sublimation: solid to gas (endothermic, absorbs energy).
• Vaporization: liquid to gas (endothermic, absorbs energy).
• Melting: solid to liquid (endothermic, absorbs energy).

Answer:

deposition (the process of deposition, where a gas changes directly to a solid, releases energy as it is an exothermic phase change; sublimation, vaporization, and melting are endothermic processes that absorb energy)