At a particular temperature, the diagram illustrates the Boltzmann distribution of the kinetic energies of the molecules in a mixture of two gases that react with each other. The reaction’s activation energy, $E_a$, is shown. The dotted curves underneath illustrate the Boltzmann distribution for the same reaction at a higher temperature. In these diagrams, $H$ denotes the activation energy at the higher temperature. Which diagram is correct?
Chemistry 9701 · AS & A Level · Reaction kinetics