JAMB/WAEC Chemistry 2027 EP 117 - Activation Energy + Free JAMB/WAEC Questions & Answers

JAMB/WAEC Chemistry EP 117 - Activation Energy + Free JAMB/WAEC Questions & Answers In this lesson, we explain Activation Energy, a key concept in Chemical Energetics and Reaction Kinetics. Activation energy determines whether a chemical reaction will occur and how fast it proceeds. It is one of the most frequently tested topics in JAMB, WAEC, NECO, and Post UTME Chemistry. Topics Covered • Activation Energy • Collision Theory • Activated Complex • Reaction Rate • Catalysts • Energy Profile Diagram What Is Activation Energy? Activation energy is the minimum amount of energy that reacting particles must possess before a chemical reaction can occur. Only particles with enough activation energy can undergo effective collisions to form products. Why Is Activation Energy Important? ✔ Determines whether a reaction will occur. ✔ Affects the speed of a chemical reaction. ✔ Explains why some reactions are slow while others are fast. ✔ Helps explain how catalysts work. Activation Energy and Catalysts A catalyst speeds up a chemical reaction by providing an alternative reaction pathway with a lower activation energy. ✔ The catalyst is not used up during the reaction. ✔ Lower activation energy means more successful collisions and a faster reaction. Factors That Increase the Number of Successful Collisions ✔ Higher temperature. ✔ Higher concentration. ✔ Larger surface area. ✔ Presence of a catalyst. Applications of Activation Energy ✔ Industrial chemical production. ✔ Manufacture of fertilizers. ✔ Petroleum refining. ✔ Pharmaceutical industries. ✔ Food processing. Frequently Tested JAMB Areas 🔥 Activation Energy 🔥 Collision Theory 🔥 Catalysts 🔥 Effective Collisions 🔥 Reaction Rate 🔥 Energy Profile Diagram Free JAMB/WAEC Questions & Answers 1. Activation energy is the minimum energy required for? A. Melting B. Boiling C. A chemical reaction to occur D. Dissolving a substance Answer: C 2. A catalyst increases the rate of a reaction by? A. Increasing the mass of reactants B. Lowering the activation energy C. Increasing the volume of products D. Raising the boiling point Answer: B 3. According to collision theory, a reaction occurs only when particles collide with? A. Equal mass B. Sufficient energy C. Different colours D. High pressure only Answer: B 4. Which of the following increases the number of particles with activation energy? A. Lowering the temperature B. Increasing the temperature C. Decreasing concentration D. Removing the catalyst Answer: B 5. Which statement about a catalyst is correct? A. It is consumed during the reaction. B. It lowers the activation energy of the reaction. C. It increases the activation energy. D. It changes the final products. Answer: B Quick Revision Note ✔ Activation energy is the minimum energy needed for a reaction to occur. ✔ Only effective collisions lead to chemical reactions. ✔ Catalysts lower the activation energy. ✔ Lower activation energy increases the reaction rate. ✔ Increasing temperature increases the number of particles with sufficient activation energy. This lesson is highly recommended for JAMB, WAEC, NECO, and Post UTME candidates preparing for Chemistry examinations. #JAMBChemistry #WAECChemistry #ActivationEnergy #ChemicalEnergetics #ReactionRate #CollisionTheory #Catalyst #ChemistryTutorial #JAMBPastQuestions #WAECPastQuestions #NECOChemistry #O3Schools #StudySmart #ChemistryLessons