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Ch 21: Matter & Phase Changes

About This Chapter

Use the lessons in this chapter to help you refresh your knowledge of matter and phase changes in chemistry. Each lesson contains an interactive quiz to help you gauge your understanding of topics like the properties of solids and liquids and how phase changes happen.

Matter & Phase Changes - Chapter Summary

It's always fascinating to think about how water can change from a liquid (water) to a solid (ice). It's also interesting to think about the way water can form as condensation or evaporate into the air. To fully understand how these processes occur, one must think about the molecular changes that take place. This chapter can help you brush up on these processes and the different phases of matter. Specifically, the lessons cover:

  • Molecular properties of solids and liquids and kinetic molecular theory
  • The gas constant and the ideal gas law
  • Evaporation and condensation
  • Freezing and melting
  • Sublimation and deposition
  • Phase changes, phase transitions and heating curves

Our instructors have created engaging video lessons that illustrate the material in a way that makes the concepts easy to comprehend and retain. Each video lesson contains a transcript for you to follow along with or take notes. If you need to review a particular section of the lesson, you can utilize the clickable timeline below the video. After each lesson, take a quiz to see how well you understand the information. When you've completed all of the lessons, take a cumulative chapter exam to test your knowledge of the topics.

4 Lessons in Chapter 21: Matter & Phase Changes
Test your knowledge with a 30-question chapter practice test
The Kinetic Molecular Theory: Properties of Solids and Liquids

1. The Kinetic Molecular Theory: Properties of Solids and Liquids

This lesson explores the kinetic molecular theory and how it pertains to the properties of solids and liquids. You'll learn the properties of solids and liquids, discover the types of intermolecular attractions that occur between them and gain an understanding how phase changes happen.

The Ideal Gas Law and the Gas Constant

2. The Ideal Gas Law and the Gas Constant

Have you ever wondered why the pressure in your car's tires is higher after you have been driving a while? In this lesson, we are going to discuss the law that governs ideal gases and is used to predict the behavior of real gases: the ideal gas law.

Phase Change: Evaporation, Condensation, Freezing, Melting, Sublimation & Deposition

3. Phase Change: Evaporation, Condensation, Freezing, Melting, Sublimation & Deposition

Substances on Earth can exist in one of four phases, but mostly, they exist in one of three: solid, liquid or gas. Learn the six changes of phase: freezing, melting, condensation, vaporization, sublimation and deposition.

Phase Changes and Heating Curves

4. Phase Changes and Heating Curves

Learn the phases - gas, liquid, solid and plasma. Learn what a phase diagram is and what terms describe the movement between phases: melting, sublimating, freezing, vaporization, condensation, and deposition. Discover why heating curves have plateaus, what a phase transition is, and what happens during this transition.

Chapter Practice Exam
Test your knowledge of this chapter with a 30 question practice chapter exam.
Not Taken
Practice Final Exam
Test your knowledge of the entire course with a 50 question practice final exam.
Not Taken

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Other Chapters

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