Question

The activation energy (Ea) for the reaction 2N2O (g) -----> 2N2 (g) + O2 (g), H0...

The activation energy (Ea) for the reaction 2N2O (g) -----> 2N2 (g) + O2 (g), H0 = -164KJ/mol is 450.0 kJ/mol. What is the Ea for the reverse reaction?

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Answer #1

forward reaction activation energy (Ea) = 450 kJ/mol

backward reaction activation energy (Ea') = ?? kJ/mol

heat of reaction = H = -164 kJ/mol

heat of reaction = H = activation energy of froward - activation energy of backward

                       H = Ea - Ea'

                      -164 = 450 - Ea'

                         Ea' = 450+164

                         Ea' = 614 kj/mol

backward reaction (reverse) activation energy (Ea') = 614 kJ/mol

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