Thermal decomposition
What is thermal decomposition?
Heat can make some compounds break down. This is called thermal decomposition. It is a type of chemical reaction.
Thermal decomposition reactions need high temperatures. The compounds need a lot of energy to split into simpler substances.
The compound that breaks down is the reactant. It can split into elements or other compounds.
Thermal decomposition reactions take in energy from the surroundings. They are endothermic reactions. We use them when we cook and bake cakes.
Test your understanding of chemical breakdown reactions and gas testing based on the lesson content. 1. What must be applied to a compound for thermal decomposition to take place? 2. When copper carbonate undergoes thermal decomposition, what color change is observed in the solid? 3. Which gas is produced during the thermal decomposition of metal carbonates? 4. Why is thermal decomposition described as an 'endothermic' reaction? 5. What is the correct word equation for the decomposition of calcium carbonate? Summary: 🧪 Knowledge Check: Thermal Decomposition
Click to Reveal Answers
2. From green to black (Green copper carbonate turns into black copper oxide).
3. Carbon dioxide (This gas is common to the decomposition of metal carbonates).
4. It takes in heat from the surroundings (Endothermic reactions require constant energy input).
5. Calcium carbonate → Calcium oxide + Carbon dioxide (The metal carbonate breaks into its oxide and CO2).