Section 16.4 Calculating Enthalpy Changes

Practice Test
      
  1.Calculate ΔH° for the following reaction.

Fe3O4(s) + CO(g) → 3FeO(s) + CO2(g) ΔHf°(kJ/mol) -1118 -110.5 -272 -393.5		  
  a.   -263 kJ  
  b.   54 kJ  
  c.   19 kJ  
  d.   neg. 50 kJ  
  Hint    
      
  2.Calculate the enthalpy for the reaction:

2ZnS(s) + 3O2(g) → 2ZnO (s) + 2SO2(g) ΔHf° (kJ/mol) -206.0 0 -348.3 –296.8		  
  a.   -270.6 kJ  
  b.   -878.2 kJ  
  c.   +270.6 kJ  
  d.   +878.2 kJ  
  Hint    

 
   
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