Question

A certain reaction has an enthalpy of AH = 59 kJ and an activation energy of Ea = 96 kJ. What is the activation energy of the reverse reaction? Ea(reverse) kJ

Answer 1

The activation energy for the reverse of a reaction equals the absolute value of the enthalpy change of the reaction added to the activation energy of forward reaction. Substituting with the given values, it turns out that the activation energy of the reverse reaction is 155 kJ.

Step-by-step explanation:

In Chemistry, the activation energy for the reverse of a reaction is determined by the sum of the enthalpy of the reaction (ΔH) and the activation energy for the forward reaction (Ea). This relationship can be written as Ea(reverse) = |ΔH| + Ea(forward). In this case, given that ΔH = 59 kJ and Ea(forward) = 96 kJ, you can calculate the activation energy for the reverse reaction as follows: Ea(reverse) = |59 kJ| + 96 kJ = 155 kJ. Thus, the activation energy of the reverse reaction is 155 kJ.

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