* Melting: This is the process of a solid turning into a liquid. The molecules in a solid are tightly packed and vibrate in place. When you add heat, these vibrations increase, causing the molecules to move further apart and break free from their rigid structure, becoming a liquid.
* Freezing: This is the process of a liquid turning into a solid. As the temperature drops, the molecules in a liquid slow down and move closer together. Eventually, they become locked in a fixed arrangement, forming a solid.
Key Points:
* No new substances are formed: Melting ice (H₂O) still results in water (H₂O), just in a different state.
* The change is reversible: Freezing water into ice can be reversed by melting it.
* Energy is involved: Melting requires energy to be added (heat), while freezing releases energy (heat).
Let me know if you'd like a more detailed explanation of the molecular processes involved!
