Activation energy is defined as the minimum energy required for reactants to collide and form products; what role does it play in reaction rate?

• A. Activation energy is the energy released when bonds are formed, which speeds up the reaction.
• B. Activation energy is the minimum energy required for reactants to collide and form products; higher Ea slows the rate, lower Ea speeds it up.
• C. Activation energy is the energy required to reach equilibrium.
• D. Activation energy is the energy absorbed by the catalyst only.

Answer: (B)