What is the activation energy for the reverse of this reaction?
`N_(2)O_(4)(g)rarr2NO_(2)(g) `
Data for the given reaction is :` DeltaH=+54 kJ `and `E_(a)=+57.2kJ`:

Explanation

To find the activation energy for the reverse reaction of the given reaction \( N_2O_4(g) \rightarrow 2NO_2(g) \), we can use the relationship between the activation energies of the forward and reverse reactions along with the change in enthalpy (\( \Delta H \)).

### Step-by-Step Solution:

1. **Identify the given data**:
- Change in enthalpy (\( \Delta H \)) for the forward reaction: \( +54 \, \text{kJ} \)
- Activation energy for the forward reaction (\( E_a \) forward): \( +57.2 \, \text{kJ} \)

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