Question

One mole of a perfect gas expands isothermally and reversibly from \(10\text{dm}^3\) to \(20\text{dm}^3\) at \(300\text{ K}\) . Find \(\Delta \text{U}\), q and work done respectively in the process. \(\left( \text{R} = 8.3 \times 10^{-3} \text{ kJ K}^{-1} \text{ mol}^{-1} \right)\)

• A. \(0.0\text{ kJ}, 1.726\text{ kJ}, -1.726\text{ kJ}\)
• B. \(0.0\text{ kJ}, -17.48\text{ kJ}, -17.48\text{ kJ}\)
• C. \(-1.726\text{ kJ}, 0\text{ kJ}, 1.726\text{ kJ}\)
• D. \(0.0\text{ kJ}, 21.84\text{ kJ}, -21.84\text{ kJ}\)

Hint:

Isothermal rule: \(\Delta U = 0\), so \(q = -w\).

Answer 1

The Correct Option is A