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| 1. |
Foran isolated system, DetlaU = 0, what will beDeltaS? |
| Answer» Solution :`DeltaU=0` means that energy factor has no mole role to PLAY. Hence for the process to be spontaneous , entropyfactor should favour the process, i.e., `DeltaS`MUT be `+ve` (i.e., `DeltaSgt 0)`. ( Considert the example of twogases CONTAINED separately in two bulbs connnected by a stop-cock, and ISOLATED from the SURROUNDINGS as an example of an isolated system. On opening the stocp - cock, the two gases mix up, i.e., the system becomes more disordered. This implies that `DeltaS gt 0` But`DeltaU = 0` for the process ) | |