Energetics

The average bond energies for O–O and O=O are 146 and 496 kJ/mol respectively.
Find the enthalpy in kJ for the following reaction:
H–O–O–H ⟶ 2OH

 
 
 
 

The average bond dissociation energy for the C–H bond is 412 kJ/mol.
Which of the following processes will have an enthalpy change close to 412 kJ/mol?

 
 
 
 

What does it show when a chemical reaction is exothermic?

 
 
 
 

Which of the following reactions has the least value of activation energy?

 
 
 
 

What does it show when a chemical reaction is exothermic?

 
 
 
 

The following reaction is an exothermic reaction:
H₂ + Cl₂ ⟶ 2HCl
From where does the energy come to break the bonds of H₂ and Cl₂?

 
 
 
 

Which reaction do you expect to be a reversible reaction?

 
 

Why does the following exothermic reaction not occur?
C (Diamond) ⟶ C (Graphite) ΔH = –3 kJ/mol

 
 
 
 

When NaOH and HCl are mixed, the temperature increases. The reaction is

 
 
 
 

What are the products of anaerobic respiration?

 
 
 
 

Formation of which hydrogen halide from the elements is an endothermic reaction?

 
 
 
 

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