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| 1. |
A piston-cylinder contains carbon dioxide at 2MPa with V=50 L. The device has a mass of 4 kg. Everything is initially at 200°C. By heat transfer the whole system cools to 25°C, at which point the gas pressure is 1.5 MPa. Find the work done.$ |
| A. | -10.0 kJ |
| B. | -12.0 kJ |
| C. | -14.0 kJ |
| D. | -16.0 kJ |
| Answer» D. -16.0 kJ | |