Question

Which statement best describes the energy changes associated with evaporation and boiling?

Atoms gain energy during evaporation and boiling.
Atoms lose energy during evaporation and boiling.
Atoms gain energy during evaporation but lose energy during boiling.
Atoms lose energy during evaporation but gain energy during boiling.



Brian made this table to organize his notes on changes of state.

A 2-column table with 4 rows. The first column titled change of state has entries melting, freezing, deposition, condensation. The second column labeled energy change has entries gain, lose, gain, lose.

Which change of state has the wrong energy change listed?

condensation
deposition
melting
freezing



During which changes of state does the motion of the atoms decrease?

melting and deposition
freezing and condensation
condensation and evaporation
vaporization and sublimation

Answer 1

1) Atoms gain energy during evaporation and boiling.
- Evaporation and boiling (vaporization) require energy input to overcome intermolecular forces, so particles gain energy.

2) Deposition.
- Deposition (gas → solid) releases energy, so listing it as "gain" is incorrect.

3) Freezing and condensation.
- Both freezing (liquid → solid) and condensation (gas → liquid) involve a loss of kinetic energy, so particle motion decreases.