Question 2 of 10 Which of the following statements concerning the collision theory of reaction rates is correct? 1. The activation energy is the difference between the EAHf° (products) and EAHf° (reactants). 2. The activation energy for the forward reaction is the negative of the activation energy for the reverse reaction. 3. The pre-exponential or frequency factor in the Arrhenius equation is a measure of the fraction of reactant molecules having sufficient energy to react. 4. The activation energy of a chemical reaction changes with temperature. O A. 4 only O B. 2 only O C. 1 only O D. 3 only O E. none Reset Selection