State an example characterized by a change in state, along with the chemical equation.
a) Ice melting to water: H₂O(s) → H₂O(l)
b) Water vapor condensing to liquid water: H₂O(g) → H₂O(l)
c) Solid iodine subliming to gaseous iodine: I₂(s) → I₂(g)
d) Liquid nitrogen evaporating to gaseous nitrogen: N₂(l) → N₂(g)
