IN SEVEN SENTENCES
Describe: Melting ice is a physical change while creating the compound, water (H2O), is chemical. Why?
Melting ice is a physical change because it does not involve the formation of a new substance. It is a phase transition from a solid state (ice) to a liquid state without any change in the chemical composition. The water molecules in ice rearrange themselves to form a liquid, but they remain as H2O molecules.
On the other hand, creating water (H2O) through a chemical process involves the combination of two different elements, namely hydrogen (H) and oxygen (O), to form a new compound with distinct properties. During the chemical reaction, the bonds between hydrogen and oxygen atoms break and new bonds between hydrogen and oxygen atoms are formed, resulting in the production of water molecules.
The chemical reaction involved in creating water typically requires an energy source and a catalyst to facilitate the process. It is a transformation of the constituent elements into a completely different compound with its own unique properties, and this is why it is considered a chemical change.