One mole of oxygen is heated at constant pressure starting at `0^(@)C`. How much heat energy must be added to the gas to double its volume ?

Explanation

To solve the problem of how much heat energy must be added to one mole of oxygen to double its volume at constant pressure, we can follow these steps:

### Step-by-Step Solution:

1. **Identify Initial Conditions**:
- Number of moles (n) = 1 mole
- Initial temperature (Ti) = 0°C = 273 K
- Initial volume (Vi) = Vi (unknown but will be used in relation to Vf)
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