1.6.2 Thermal Decomposition

• Thermal decomposition is the process in which a compound breaks down into simpler substances when heated
• The chemical formula for limestone is CaCO3.


  True
• The thermal decomposition of calcium carbonate requires a temperature between 800 and 900°C.
• Calcium carbonate decomposes into calcium oxide and carbon dioxide when heated.


  True
• In thermal decomposition, calcium carbonate breaks down into calcium oxide and carbon dioxide.
• Adequate ventilation is necessary to remove carbon dioxide during thermal decomposition of limestone.

  True
• Calcium carbonate is a key ingredient in cement production.


  True
• What is the chemical name for limestone?

  Calcium carbonate
• At what temperature range does the thermal decomposition of limestone typically occur?

  800-900°C
• Carbon dioxide produced during limestone decomposition contributes to the greenhouse effect.


  True
• What is one agricultural use of calcium oxide?

  pH adjustment
• What is the primary role of CaO in cement production?

  Binding agent
• What is the balanced chemical equation for the thermal decomposition of calcium carbonate?

  $CaCO3 (s) → CaO (s) +$$CO2 (g)$
• Why is proper ventilation necessary during the thermal decomposition of calcium carbonate?

  To remove CO2 gas
• Adequate ventilation is necessary during the thermal decomposition of limestone to prevent the reverse reaction.


  True
• What is another name for calcium oxide?

  Lime
• The calcium oxide produced from limestone decomposition is a key ingredient in the manufacture of cement
• What is the balanced chemical equation for the thermal decomposition of calcium carbonate?

  $CaCO3 (s) → CaO (s) +$$CO2 (g)$
• Limestone is another name for calcium carbonate.


  True
• Order the components of the thermal decomposition reaction based on their state:

  1️⃣ CaCO3 (Solid)

  2️⃣ CaO (Solid)

  3️⃣ CO2 (Gas)
• The thermal decomposition of calcium carbonate requires a temperature between 800 and 900°C.
• The thermal decomposition of limestone occurs at high temperatures
• Adequate ventilation removes CO2
• Calcium oxide is a white solid compound with high chemical reactivity
• Calcium oxide is used in metallurgy to remove impurities from steel.


  True
• Recycling limestone waste from cement production helps improve sustainability in the industry.

  True