Thermochemistry

 60) 2H₂(g) + O₂(g) 2H₂O(g)              ΔH = -483.6 kJ          

                    3O₂(g) 2O₃(g)                  ΔH = +284.6 kJ

      3H₂(g) + O₃(g) 3H₂O(g)                ΔH = ?

      3H₂(g) + 3/2O₂(g) 3H₂O(g)           ΔH = 3/2(-483.6 kJ)

                          O₃(g) 3/2O₂(g)           ΔH = 1/2(+284.6 kJ)
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           3H₂(g) + O₃(g) 3H₂O(g)           ΔH = -867.7 kJ