Calculate the volume (in `"cm"^3`) of air expelled from a vessel containing 0.4 litres of it at 250 K. when it is heated `27^@C` at the same pressure.

Explanation

To solve the problem of calculating the volume of air expelled from a vessel when it is heated, we can use Charles's Law, which states that the volume of a gas is directly proportional to its temperature (in Kelvin) when pressure is held constant.

### Step-by-Step Solution:

1. **Identify Given Values:**
- Initial volume (V₁) = 0.4 liters
- Initial temperature (T₁) = 250 K
- Final temperature (T₂) = 27°C
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