Section: Chemistry: Section I

28) Which equation represents the phase change called sublimation?

1. CO₂(s) -> CO₂(g)
2. H₂O(s) -> H₂O(l)
3. H₂O(l) -> H₂O(g)
4. NaCl(l) -> NaCl(s)

Sublimation is a phase change in which a solid becomes a gas directly, without melting into a liquid.