Ask a question

How do I solve this AP Chemistry problem?

How do I calculate the activation energy for the reverse of the reaction NO(g) +CO(g) ==>NO(g) CO₂(g), given the activation energy for the forward reaction for the forward reaction is 125kJ/mol and ΔE=-125kJ/mol?

1 Answer by Expert Tutors

Tutors, sign in to answer this question.
John M. | High School and College Science TutorHigh School and College Science Tutor
Check Marked as Best Answer
there's a typo in your chemical equation, but that actually won't affect our calculations.  The energy change for a reaction is equal to the difference of the activation energies of that reaction and the reverse reaction.
ΔE = act E for - act E rev
-125 = 125 - x
x = 250
So the activation energy of the reverse reaction is 250kJ/mol.