Melting ice is considered a physical change because it involves a change in the state of matter from solid to liquid, without altering the chemical composition of the substance. Ice is still composed of water molecules before and after melting.
On the other hand, creating water (H2O) from its elemental components, hydrogen (H2) and oxygen (O2), involves a chemical change. This is because it involves a rearrangement of the atoms in the molecules to form a completely new substance with different chemical properties. The hydrogen and oxygen atoms combine to form new chemical bonds and create water molecules with different properties than the original hydrogen and oxygen gases.
-Melting ice is a physical change while creating the compound, water (H2O), is chemical. Why?
1 answer
1 answer