`N_(2)(g) + 3H_(2)(g) to 2NH_(3)(g) Delta_(r)H^(@) = -92.4 kJ`
What is the standard enthalpy of formation of `NH_(3)`?

Explanation

To find the standard enthalpy of formation of ammonia (NH₃) from the given reaction:

\[ \text{N}_2(g) + 3\text{H}_2(g) \rightarrow 2\text{NH}_3(g) \]
\[ \Delta_rH^\circ = -92.4 \, \text{kJ} \]

we can follow these steps:

### Step 1: Understand the Reaction
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