Describe the action of heat on `NaHSO_(3)`

Answer

To describe the action of heat on sodium bisulfite (NaHSO3), we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Compound**: Sodium bisulfite is represented by the formula NaHSO3. It consists of sodium (Na), hydrogen (H), sulfur (S), and oxygen (O).

2. **Heating the Compound**: When sodium bisulfite is heated, it undergoes thermal decomposition.

3. **Products of Decomposition**: The heating of NaHSO3 leads to the formation of sodium sulfate (Na2SO4), sulfur dioxide (SO2), and water (H2O).

4. **Chemical Equation**: The reaction can be represented by the following balanced chemical equation:
\[ 2 \text{NaHSO}_3 \xrightarrow{\text{heat}} \text{Na}_2\text{SO}_4 + \text{SO}_2 + \text{H}_2\text{O} \]

5. **Conclusion**: Thus, upon heating sodium bisulfite, we obtain sodium sulfate, sulfur dioxide, and water.