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| Q. |
When gases which are at equal pressure and temperature are mixed adiabatically without work, then |
| A. | internal energy of the gaseous system remains constant |
| B. | heat transfer of the gaseous system remains constant |
| C. | entropy of the gaseous system remains constant |
| D. | all of the mentioned |
| Answer» A. internal energy of the gaseous system remains constant | |
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