Write one equation each for decomposition reactions where energy is supplied in the form of heat, light or electricity.

Explanation

To answer the question about decomposition reactions where energy is supplied in the form of heat, light, or electricity, we will provide one equation for each type of reaction.

### Step 1: Decomposition Reaction with Heat
- **Reaction**: When calcium carbonate (CaCO₃) is heated, it undergoes thermal decomposition.
- **Equation**:
\[ \text{CaCO}_3 (s) \xrightarrow{\text{heat}} \text{CaO} (s) + \text{CO}_2 (g) \]
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