What is the activation energy of the reaction?

Question

The diagram shows the energy change over the course of a reaction.

Is the reaction endothermic or exothermic?

exothermic

endothermic

What is the activation energy of the reaction?

activation energy:

kJ/mol

Answer 1

The activation energy is 25 kJ/mole. It's the difference between the 125 and 150 on the y-axis.

The reaction is EXOTHERMIC because the final energy of the products (25 kJ/mol) is less than that of the reactants (125 kJ/mol)