Question

before the reaction started. if the reacting substances are less stable, it means that their free energy spikes. the size of this spike is called the activation energy. the situation can be graphed as follows: in this graph, what represents activation energy? the black arrow in the y - axis legend, indicating the direction of increasing free energy the black double - headed arrow at the transition state. the drop between the energy in the reactants on the far left and the energy in the products on the far right. did you fully understand the concept covered in this

Explanation:

Activation energy is the energy required to reach the transition state. The black double - headed arrow at the transition state shows the difference in free energy between reactants and the transition state, which is the activation energy. The black arrow in the y - axis legend just indicates the direction of increasing free energy. The drop between reactants and products' energy is related to the overall energy change of the reaction, not activation energy.

Answer:

The black double - headed arrow at the transition state.