Write thermal decomposition reaction of Calcium carbonate.

Explanation

To write the thermal decomposition reaction of calcium carbonate, we follow these steps:

### Step 1: Identify the Reactant
The reactant in this reaction is calcium carbonate, which is represented by the chemical formula \( \text{CaCO}_3 \).

### Step 2: Apply Heat
Thermal decomposition involves heating the reactant. Therefore, we indicate that heat is applied to the calcium carbonate.

### Step 3: Determine the Products
When calcium carbonate is heated, it decomposes into two products:
1. Calcium oxide (\( \text{CaO} \)), which is a solid.
2. Carbon dioxide (\( \text{CO}_2 \)), which is a gas that is released during the reaction.

### Step 4: Write the Balanced Chemical Equation
The balanced chemical equation for the thermal decomposition of calcium carbonate can be written as:
\[ \text{CaCO}_3 (s) \xrightarrow{\text{heat}} \text{CaO} (s) + \text{CO}_2 (g) \]

### Final Reaction
Thus, the thermal decomposition reaction of calcium carbonate is:
\[ \text{CaCO}_3 (s) \xrightarrow{\text{heat}} \text{CaO} (s) + \text{CO}_2 (g) \]

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