GL - Kinetic Molecular Theory (Lesson)
Kinetic Molecular Theory
Introduction
The Kinetic Molecular Theory of matter offers a description of the microscopic properties of atoms (or molecules) and their interactions, leading to observable macroscopic properties (such as pressure, volume, temperature). An application of the theory is that it helps to explain why matter exists in different phases (solid, liquid, and gas) and how matter can change from one phase to the next. This lesson will help illustrate the basic principles of the Kinetic Molecular Theory.
Properties of Gases and Components of Kinetic Molecular Theory
In this segment of Chemistry Matters, the host teacher describes the different properties of gases and the components of Kinetic Molecular Theory. Students are asked to make predictions about what will happen during demonstrations with gases using a balloon and marshmallow, applying the concepts of ideal gas law. They are asked to create a model demonstrating what happened at the molecular level.
Download the note taking guide for Chemistry Matters Unit 9 Segment D. Links to an external site.
At this point, you should draw molecular models to explain what happens to a balloon or a marshmallow inside the vacuum container. Remember, within the container, all air particles are being removed. What effect will this have on a balloon or marshmallow? Use the interactive below to drag and drop the balloon and marshmallow in the appropriate location to test your model. Once you have tested your models, you may continue to the lesson.
Vacuum Activity Practice
Kinetic Molecular Theory Practice
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