The document discusses the kinetic molecular theory and how it can be used to explain the properties of liquids and solids. It defines the kinetic molecular theory and its key postulates, including that matter is made of particles in constant motion, kinetic energy increases with temperature, and the amount of space between particles depends on the state of matter. It then describes the properties of solids, liquids, and gases based on this theory, noting that solids have the greatest intermolecular forces and particles vibrate in fixed positions, while liquids have less forces but particles can slide past one another.

1. Chapter 1: The Kinetic Molecular Model and Intermolecular Forces of Attraction in Matter

4. TEMPERATURE

5. KINETIC ENERGY

6. SOLID

7. LIQUID

8. SPEED

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

10. Why do solids and
liquids behave
differently?

11. Directions: Watch the short video carefully and
answer the questions that follow.

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

15. 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.

16. 1. Matter is made of particles that are constantly in motion. This energy in motion is
called kinetic energy.
2. The amount of kinetic energy in a substance is related to its temperature. Increased
temperature means greater speed.
3. There is space between particles. The amount of space in between particles is
related to the substance's state of matter.
4. Phase changes happen when the temperature of the substance changes sufficiently.
5. 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

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

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

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

20. 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.

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