An open flask at `25^@C` contains air. Calculate the temperature at which one fifth of air measured at `25^@C` escapes.

Explanation

To solve the problem of calculating the temperature at which one-fifth of air escapes from an open flask at 25°C, we can follow these steps:

### Step-by-Step Solution:

1. **Identify Initial Conditions**:
- The initial temperature \( T_1 = 25^\circ C \).
- Convert this temperature to Kelvin:
\[
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