From one state to another molecules do not...?

Answer 1

Change?

For instance - ice is water (H2O) in it's solid state. Each molecule lacks the energy needed to shake itself free from the tightly bonded solid structure.

We add energy, in the form of heat. Now each molecule can break away from the rigid structure of a solid and move around a bit more. It is a liquid. But it's still a liquid made up of molecules of H2O.

Bung in a bit more energy and each molecule of H2O now has enough energy to completely break away from other molecules of water. It's a gas. But it is still a molecule of water. All that that heat has done is to provide enough energy to break the weak bonds between individual molecules. The molecules remain the same, H2O.

The break the strong bonds between the hydrogen and the oxygen would take WAY more energy!

Answer 2

From one state to another, molecules do not change their chemical composition. The arrangement and movement of molecules may change as they undergo a change in state (such as solid to liquid), but the actual atoms and bonding within the molecules remain the same.

Answer 3

Change?

Answer 4

Mix