試題詳解

12. A sample of air initially occupies 0.280 m³ at a pressure of 202 kPa. It is next expanded isothermally to a pressure of 101 kPa and then cooled at constant pressure until it returns to its initial volume. How much work (J) has been done by the sample?
(A) 2.38 × 10⁵
(B) 8.32 × 10³
(C) 4.76 × 10⁶
(D) 6.17 x 10²
(E) 1.05 × 10⁴