* Chemical Change: A chemical change involves the formation of new substances with different chemical properties.
* What happens when you heat potassium bicarbonate?
* When you heat potassium bicarbonate, it decomposes into potassium carbonate (K2CO3), carbon dioxide (CO2), and water (H2O).
* The chemical formula changes, indicating a new substance is formed.
The reaction:
2KHCO3 (s) → K2CO3 (s) + CO2 (g) + H2O (g)
Key takeaways:
* The original potassium bicarbonate is no longer present.
* New substances with different properties are formed (potassium carbonate, carbon dioxide, and water).
* This change cannot be reversed by simply cooling the products.
Therefore, heating potassium bicarbonate is a chemical change.
