The activation energy for the reaction no2 (g) + co (g) ⟶no (g) + co2 (g) is ea = 100 kj/mol and the change in enthalpy for the reaction is δh = - 375 kj/mol. what is the activation energy for the reverse reaction? express your answer with the appropriate units.

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Chemistry

29 September, 14:01

The activation energy for the reaction no2 (g) + co (g) ⟶no (g) + co2 (g) is ea = 100 kj/mol and the change in enthalpy for the reaction is δh = - 375 kj/mol. what is the activation energy for the reverse reaction? express your answer with the appropriate units.

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Kyle Adkins · Answer 1

Answer: The activation energy for the reverse reaction is equal to the sum of the absolute value of DH + Ea (forward) or 275 kJ + 125 kJ = 400 kJ If you just sketch an energy diagram showing the activation energy and Delta H for the reaction, it should be apparent why this is the case.