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Physical Science: Fluids and Dynamics Outcome C6 – Describe the relationship between solids, liquids, and gases using the kinetic molecular theory.

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Presentation on theme: "Physical Science: Fluids and Dynamics Outcome C6 – Describe the relationship between solids, liquids, and gases using the kinetic molecular theory."— Presentation transcript:

1 Physical Science: Fluids and Dynamics Outcome C6 – Describe the relationship between solids, liquids, and gases using the kinetic molecular theory

2 The Kinetic Molecular theory – Pg 102 –All matter can exist in 3 states –1. Solids 2. Liquids 3. Gases

3 The Kinetic Molecular theory – Pg 102 –The Kinetic Molecular Theory (or KMT for short) states that: 1. All matter is composed of molecules or other types of particles 2. Particles are in constant motion 3. There are forces of attraction among particles

4 The Kinetic Molecular theory – Pg 102 – Kinetic energy – is the energy of motion. If a substance is in motion, then it has kinetic energy. –When something is not in motion, or has stopped moving, then it has no kinetic energy – The Kinetic molecular theory is used to explain what happens to matter when the kinetic energy of particles change

5 The Kinetic Molecular theory – Pg All matter is composed of molecules or other types of particles – Particles are made up of molecules and compounds. These are made up of atoms.

6 The Kinetic Molecular theory – Pg Particles in a substance are always in motion. – When the particles in a substance move very little, the substance is in a solid state –When the particles in a substance move very quickly, the substance is in a gas state – When the particles in substance move an average amount, the substance is in a liquid state

7 The Kinetic Molecular theory – Pg 102 –The state a substance is in, depends on how much energy it has. – The higher the energy, the more likely it will be in a gas state. The lower the energy, the more likely it will be in a solid state. At a medium level, it is likely to be liquid.

8 The Kinetic Molecular theory – Pg 102 –The amount of energy required to change the state of a substance is relative to the specific substance. –For ex: At 100 o C, water is boiling and turning into gas –At -57 o C Carbon dioxide will boil and turn into a gas

9 The Kinetic Molecular theory – Pg 102

10 –3. there are forces of attraction among particles – This force causes particles to come close together. –However, with enough kinetic energy, particles begin to move and they will move apart from one another. – Solids have tightly packed particles – Liquids have particles that are moving and far apart – Gases have particles that are moving very quickly and very far apart

11 The Kinetic Molecular theory – Pg 102 –Changes of state: The processes by which a substance can change into the three different states of matter: Liquid, Solid or Gas – Melting – when a substance changes from solid to liquid – Evaporation – when a substance changes from liquid to gas

12 The Kinetic Molecular theory – Pg 102 – Condensation – when a substance changes from gas to a liquid – Solidification – when a substance changes from a liquid to a solid –Ex: freezing – Sublimation – when a substance changes from a solid to a gas or gas to a solid – Ex: Fro

13 The Kinetic Molecular theory – Pg 102

14 ONE MINUTE TO THINK OF AN ANSWER WITH YOUR PARTNER 30 SECONDS LEFT TIME IS UP


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