Three moles of an ideal gas are expanded isothermally and reversibly at `27^(@)C` to twice its original volume. Calculate `q, w,` and `DeltaU`.

Explanation

To solve the problem, we will calculate the heat (q), work done (w), and change in internal energy (ΔU) for the isothermal expansion of an ideal gas.

### Given Data:
- Number of moles (n) = 3 moles
- Initial temperature (T) = 27°C = 300 K
- Initial volume (V1) = V (unknown)
- Final volume (V2) = 2V1 = 2V

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