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| 1. |
As per cooled water freezes spontaneously, its temperature rises to `0^(@)C. DeltaH` for the spontaneous process. `H_(2)O_((l))(-10^(@)C)toH_(2)O_((s))(0^(@)C)` is :A. zeroB. `+ve`C. `-ve`D. either of these |
| Answer» No energy is transferred to or from the system. The energy liberated in the freezing process warms the system to `0^(@)C`. Thus `DeltaH=0` | |