Thermal decomposition of `(NH_(4))_(2)Cr_(2)O_(7)` involves.

Answer

To solve the question regarding the thermal decomposition of ammonium dichromate \((NH_4)_2Cr_2O_7\), we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Compound**:
The compound we are dealing with is ammonium dichromate, which has the formula \((NH_4)_2Cr_2O_7\).

2. **Understand Thermal Decomposition**:
Thermal decomposition is a chemical reaction where a single compound breaks down into two or more products when heated.

3. **Write the Decomposition Reaction**:
When ammonium dichromate is heated, it decomposes into chromium(III) oxide, nitrogen gas, and water vapor. The balanced chemical equation for this reaction is:
\[ (NH_4)_2Cr_2O_7 (s) \rightarrow Cr_2O_3 (s) + N_2 (g) + 4 H_2O (g) \]

4. **Identify the Products**:
From the decomposition reaction, we can see that the products formed are:
- Chromium(III) oxide \((Cr_2O_3)\) (solid)
- Nitrogen gas \((N_2)\) (gas)
- Water vapor \((H_2O)\) (gas)

5. **Conclusion**:
The thermal decomposition of ammonium dichromate produces chromium(III) oxide, nitrogen gas, and water vapor.

### Final Answer:
The thermal decomposition of \((NH_4)_2Cr_2O_7\) involves the formation of chromium(III) oxide, nitrogen gas, and water vapor.

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