At `60^(@)C`, dinitrogen tetroxide is 50 per cent dissociated. Calculate the standard free energy change at this temperature and at one atmosphere.

Explanation

To calculate the standard free energy change (ΔG°) for the dissociation of dinitrogen tetroxide (N2O4) at 60°C and at a pressure of 1 atmosphere, we can follow these steps:

### Step 1: Understand the Reaction
The dissociation of dinitrogen tetroxide can be represented as:
\[ \text{N}_2\text{O}_4 (g) \rightleftharpoons 2 \text{NO}_2 (g) \]

### Step 2: Determine the Extent of Dissociation
Given that dinitrogen tetroxide is 50% dissociated, we can assume:
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