Lesson 1_Kinetic Molecular Theory of Solids and Liquids.pptx

CHEMISTRY

1. Chapter 1: The Kinetic Molecular Model and Intermolecular Forces of Attraction in Matter KINETIC MOLECULAR THEORY OF SOLIDS AND LIQUIDS The

2. UNLOCK THE WORD!

3. TEMPERATURE

4. KINETIC ENERGY

5. SOLID

6. LIQUID

7. SPEED

8. Use the kinetic molecular model to explain properties of liquids and solids (STEM_GC11IMFIIIa-c-99) Learning Competenc y

9. Why do solids and liquids behave differently?

10. Experiment Time! Directions: Watch the short video carefully and answer the questions that follow.

11. Questions: What happen after dropping the food color into the water? Why did this happen? How can you compare the rate of diffusion in the two glasses? What is the reason for this difference? How can you relate the kinetic molecular theory with the experiment?

12. What is Kinetic Molecular Theory? The kinetic-molecular theory is a theory that explains the states of matter and is based on the idea that matter is composed of tiny particles that are always in motion.

13. Matter is made of particles that are constantly in motion. This energy in motion is called kinetic energy. The amount of kinetic energy in a substance is related to its temperature. Increased temperature means greater speed. There is space between particles. The amount of space in between particles is related to the substance's state of matter. Phase changes happen when the temperature of the substance changes sufficiently. There are attractive forces in between particles called intermolecular forces. The strength of these forces increase as particles get closer together. Postulates of Kinetic Molecular Theory

14. SOLID Definite shape and volume. Difficult to compress. Particles of solids are tightly packed, vibrating about a fixed position. Has the greatest force of attraction between particles.

15. LIQUID Definite volume , No definite shape Hard to compress Particles slide past each other Forces of attraction between particles still high, next to solids

16. GAS No definite shape or volume Expands to fill container Little attraction between particles “Vapor” = a gaseous state of something that is normally liquid (Ex: water vapor)

17. Directions: Based on the picture, identify what state of matter is being represented. Write a brief description based on the arrangement of their particles and give three examples for each state. Activity 1

18. Activity 2 Directions: Compare the properties of solids and liquids by completing the table based on their kinetic molecular model