EVERYDAY SCIENCE

Detailed explanation-1: -The gas form water vapor has the highest internal energy per gram of water, followed by liquid water, and then ice.

Detailed explanation-2: -Explanation: Boiling is a phase change from liquids to gas. Therefore we are looking for a segment that is flat (because the potential energy is increasing) and that is between the liquid and gas phases. In this case, gas phase is the highest energy phase, and liquids is the next highest.

Detailed explanation-3: -Explanation: In the process of condensation, freezing, and deposition, water releases energy. The energy released allows water molecules to change the binding pattern, transforming it into a lower energy state.

Detailed explanation-4: -Exothermic processes release energy. Our question asks about exothermic phase changes, which means water will form stronger intermolecular bonds. This occurs when gas turns to liquid, and when liquid turns to solid.

Detailed explanation-5: -Latent heat of condensation is energy released when water vapor condenses to form liquid droplets. An identical amount of calories (about 600 cal/g) is released in this process as was needed in the evaporation process.