Question

what is the activation energy in this energy diagram (in kj)? 120 100 80 pe (kj) 60 40 reaction pathway 20 60 -20 40

Explanation:

Step1: Identify activation energy concept

Activation energy is the difference between the energy of the reactants and the energy of the transition - state.

Step2: Determine reactant and transition - state energies

From the graph, the energy of the reactants is 60 kJ and the energy of the transition - state is 120 kJ.

Step3: Calculate activation energy

$E_a=120 - 60$

Answer:

60 kJ