The graph below shows two reactions run in a laboratory. The vertical axis indicates the amount of energy in units of joules. Each reaction involved the same quantities of reactants and products. However, one reaction was run with a catalyst, and one was run without a catalyst:
Part A Explain how you know which curve represents the reaction with the catalyst and which represents the reaction without the catalyst.
Part B: Describe how to calculate the activation energy with the catalyst, and state the activation energy, in joules.