Two changes are described below.
- Water vapor condenses.
- Liquid water separates
into hydrogen and oxygen.
Which statement is true about the two changes?
Both are chemical changes because new substances are formed.
Both are physical changes because only the physical state of the substances change.
1 is a physical change due to a change of state, but B is a chemical change because new molecules are formed.
1 is a chemical change due to a change of state, but B is a physical change because new molecules are formed.