COLLISION THEORY another ppt for grade 11

another ppt that is more defined

1. CHEMICAL KINETICS

2. KINETICS Kinetics is the branch of chemistry that studies the rate at which a chemical process occurs. The word ‘rate’ here refers to how quickly or slowly a reaction takes place.

3. Categories of Reaction Speed 1. Slow Reactions – These take a long time. 2. Moderately Fast Reactions – These happen within minutes to hours. 3. Very Fast Reactions – These occur almost instantly.

4. According to Collision Theory... Collide with each other. Have enough energy to break and form bonds. Collide with the correct orientation to form a product. for a reaction to occur, particles must:

5. Potential energy curves; The reactants start with a certain energy level. To react, they must reach the activation energy peak. After the peak, the reaction moves towards the products, releasing or absorbing energy.

6. Reactions can be classified as: Exothermic Endothermic

7. Reactions can be classified as: Exothermic – Releases energy (heat), meaning the products have less energy than the reactants. (Example: Burning wood, explosions.)

8. Reactions can be classified as: Endothermic – Absorbs energy, so the products have more energy than the reactants. (Example: Cooking food, photosynthesis.)

9. ACTIVITY BRING OUT 1/4 SHEET OF PAPER “MA’AM ONE WHOLE SHEET PO?” “OPO ONE WHOLE SHEET”

10. 1.  What happens when reactant molecules collide without enough energy? a) They form products immediately. b) They bounce off each other without reacting. c) They absorb energy and speed up. d) They break down into smaller molecules. 2.  Which of these reactions is exothermic? a) Boiling water b) Melting ice c) Burning wood d) Photosynthesis 3.  Which factor explains why food spoils faster at room temperature than in the refrigerator? a) Higher temperature increases reaction rates b) Lower temperature increases reaction rates c) Light exposure stops chemical reactions d) Food molecules do not react at lower temperatures

11. 4 . In an exothermic reaction, how does the energy of the products compare to the reactants? a) Products have higher energy than reactants b) Products have lower energy than reactants c) Both have the same energy d) Energy is absorbed by the products 5. Which reaction would most likely happen spontaneously at room temperature? a) Photosynthesis b) Rusting of iron c) Firewood burning d) Mixing baking soda and vinegar

12. Work in teams to create an infographic on how reaction rates are used in food preservation, medicine, and energy production. ACTIVITY 1

13. SUMMARY Chemical kinetics studies reaction rates and their influencing factors. Collision Theory states that molecules must collide with enough energy and correct orientation to react. Potential energy curves show activation energy, classifying reactions as exothermic or endothermic. Reaction rates affect food preservation, medicine, and industries.

14. THANK YOU FOR LISTENING!