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Question

2Zn+O2 3/2 →2ZnODG°=616J 2Zn+S2→2ZnSDG°=–293J S2+2O2 3/4 →2SO2DG°=408J DG°forthefollowingreactionis-2ZnS+3O2 3/4 →2ZnO+2SO

  1. 731J    
  2. 1317J    
  3. 501J    
  4. +731J    

The correct answer is: –731J

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