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The enthalpoformatioof ammonia is–46.0KJ mol–1.Thenthalpchangfothreaction 2NH3(g)→N2(g)+3H2(gis-

  1. 46.0KJmol1    
  2. 92.0KJmol1    
  3. 23.0KJmol1    
  4. 92.0KJmol1    

The correct answer is: –92.0KJmol1

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