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Ch 14: Holt Physical Science Chapter 14: Chemical Reactions

About This Chapter

The Chemical Reactions chapter of this Holt Physical Science Textbook Companion Course helps students learn essential physical science lessons of chemical reactions. Each of these simple and fun video lessons is about five minutes long and is sequenced to align with the Chemical Reactions textbook chapter.

How it works:

  • Identify the lessons in Holt Physical Science Chemical Reactions chapter with which you need help.
  • Find the corresponding video lessons within this companion course chapter.
  • Watch fun videos that cover the chemical reactions topics you need to learn or review.
  • Complete the quizzes to test your understanding.
  • If you need additional help, rewatch the videos until you've mastered the material or submit a question for one of our instructors.

Students will learn about:

  • Chemical reactions and steps for balancing a chemical equation
  • Common chemical reactions in relation to energy change
  • Endothermic and exothermic reactions
  • Effects of temperature on the rate of a chemical reaction
  • Modifying factors to the rate of a chemical reaction
  • Activation energy and catalysts

Holt is a registered trademark of Holt, Rinehart and Winston, which is not affiliated with Study.com.

7 Lessons in Chapter 14: Holt Physical Science Chapter 14: Chemical Reactions
What Is a Chemical Change? - Properties, Types & Examples

1. What Is a Chemical Change? - Properties, Types & Examples

Chemical changes are fundamental changes that produce new combinations of matter. A distinction is made between chemical and physical changes. The signs of chemical changes are discussed, and several types of chemical changes are explored in this lesson.

Chemical Reactions and Balancing Chemical Equations

2. Chemical Reactions and Balancing Chemical Equations

In this lesson, you'll learn how to balance a chemical reaction equation using the conservation of matter law. You'll also learn how to write both word and formula equations, what the subscripts after a letter mean and what the numbers in front of compounds mean.

Common Chemical Reactions and Energy Change

3. Common Chemical Reactions and Energy Change

This lesson covers the five common types of chemical reactions: combination, decomposition, single-replacement, double-replacement, and combustion. You will learn how to predict what kind of chemical reaction will occur. You'll also explore how matter is conserved, but energy can change.

Endothermic and Exothermic Reactions

4. Endothermic and Exothermic Reactions

Explore a chemical reaction at the molecular level. Learn about exothermic and endothermic reactions, what they look like and what happens when they occur. Understand enthalpy and how you can use it to predict whether a reaction will be exothermic or endothermic.

Rate of a Chemical Reaction: Effect of Temperature

5. Rate of a Chemical Reaction: Effect of Temperature

Learn how temperature affects reaction rates. Discover the rate law as well as how the Arrhenius equation relates to the rate law and predicts the effect of temperature on the rate of reaction.

Rate of a Chemical Reaction: Modifying Factors

6. Rate of a Chemical Reaction: Modifying Factors

Why are some reactions much faster than others? Is it possible to change how fast a reaction occurs? In this lesson, you will learn what the rate of a chemical reaction is. You will also discover how factors such as temperature, concentration, surface area, and catalysts impact reaction rates.

Activation Energy and Catalysts

7. Activation Energy and Catalysts

Learn how to define activation energy and how it relates to a reaction's energy. Learn what an activated complex is and where it fits into an activation energy diagram. Discover how a catalyst works to change the activation energy of a reaction and what this means to metabolism in the body.

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