A reaction has an enthalpy change of -54kj and an activation energy of 89kj. What is the enthalpy change of the reverse reaction?

Answer 1

Hi James! The enthalpy change of the reverse reaction is the -ΔH of the forward reaction. In this case, since the ΔH of the forward reaction is -54kJ, the ΔH of the reverse reaction is -(-54kJ) which is also +54kJ. I hope this helps!