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Ch 5: Overview of Reactions in Chemistry

About This Chapter

Work through our chapter on reactions in chemistry at your own pace as you prepare for an important exam or finish your homework assignments. You can study at any time on your tablet or computer when you watch these video lessons and take the accompanying quizzes.

Overview of Reactions in Chemistry - Chapter Summary

This chapter on chemistry reactions takes the stress out of studying by making these topics approachable and easy to understand. Our video lessons present information about the ways in which chemical reactions form new products and examples of synthesis reaction, plus information on decomposition reactions, and single- and double-displacement reactions. You'll also discover facts about combination reaction and exothermic and endothermic reactions. This chapter is designed to assist you in achieving the following goals:

  • Discuss the rate of a chemical reaction
  • Outline activation energy and catalysts
  • Explain changes in heat and energy diagrams
  • Detail the significance of collision theory
  • Differentiate between chemical and dynamic equilibrium
  • Define LeChatelier's principle and its relationship to equilibrium
  • Identify the equilibrium constant (K) and reaction quotient (Q)
  • Explore the significance of Gibbs free energy

Even if you've struggled with these topics before, our video lessons provide a helpful way to quickly and easily understand what you're studying. These learning materials are available 24 hours a day via your devices or computer, ensuring your ability to study whenever you need to. Use the Dashboard to keep tabs on your progress through the chapter and to submit questions to an instructor.

15 Lessons in Chapter 5: Overview of Reactions in Chemistry
Test your knowledge with a 30-question chapter practice test
How Chemical Reactions Form New Products

1. How Chemical Reactions Form New Products

After watching this video, you will be able to explain what a chemical reaction is and how the products can have completely different properties to the reactants. A short quiz will follow.

Synthesis Reaction: Definition, Formula & Examples

2. Synthesis Reaction: Definition, Formula & Examples

Synthesis reactions, the act of combining two or more substances together to make a product, occur all around us, from the kitchen to our chemical laboratories. In this lesson, learn more about this amazing reaction, its formula, and examples.

Decomposition Reaction: Definition & Examples

3. Decomposition Reaction: Definition & Examples

Chemical reactions are classified into several different categories. In this lesson, you will learn about decomposition reactions so you can describe and identify them in the future.

Single-Displacement Reaction: Definition & Examples

4. Single-Displacement Reaction: Definition & Examples

There are so many chemical reactions that occur around us that we classify them into different types. In this lesson, we will discuss single-displacement reactions, one of the main types of chemical reactions.

Double Displacement Reaction: Definition & Examples

5. Double Displacement Reaction: Definition & Examples

When a chemical reaction occurs, bonds are broken and new bonds are formed and products have a different identity from the reactants. In this lesson, we will discuss one of the main types of chemical reactions, called a double displacement reaction.

Combination Reaction: Definition & Examples

6. Combination Reaction: Definition & Examples

There many types of chemical reactions. In a combination reaction, you can predict the product if you know what goes into it. Find out more about combination reactions and see some examples.

Endothermic and Exothermic Reactions

7. 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: Modifying Factors

8. 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

9. 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.

Changes in Heat and Energy Diagrams

10. Changes in Heat and Energy Diagrams

Did you know that temperature and heat are not the same thing? Did you know that the temperature of water doesn't change when it boils? This lesson describes the relationship between heat and temperature. Diagrams are used to illustrate the relationship between heat and temperature during phase changes.

Collision Theory: Definition & Significance

11. Collision Theory: Definition & Significance

This lesson will define and explain collision theory and explore how it is related to chemical reactions and reaction rates. So if you've ever wondered how two particles combine to form a new product, read on!

Equilibrium: Chemical and Dynamic

12. Equilibrium: Chemical and Dynamic

Learn the definition of chemical equilibrium and how it is dynamic. Discover what the equilibrium constant is and how it shows whether the reaction favors the reactants or products. Learn how chemists designate equilibrium in an equation and how they show the difference in reaction rate.

LeChatelier's Principle: Disruption and Re-Establishment of Equilibrium

13. LeChatelier's Principle: Disruption and Re-Establishment of Equilibrium

Learn how Le Chatelier's Principle describes the disruption and re-establishment of equilibrium. Learn to explain the factors that disrupt equilibrium, such as concentration, temperature, and pressure. Learn how each of these factors affects a system in equilibrium.

Equilibrium Constant (K) and Reaction Quotient (Q)

14. Equilibrium Constant (K) and Reaction Quotient (Q)

In this lesson, we will first define and explain the notion of a chemical equilibrium. Then, you'll learn about the equilibrium constant and reaction quotient. Finally, we'll round off the lesson with a couple of examples to solidify what you've learned!

Gibbs Free Energy: Definition & Significance

15. Gibbs Free Energy: Definition & Significance

Have you ever wondered why some things just happen spontaneously? Have you ever asked yourself why salt dissolves in water? In this lesson, you will understand the meaning of the Gibbs free energy and how it helps us predict if a chemical reaction will happen spontaneously.

Chapter Practice Exam
Test your knowledge of this chapter with a 30 question practice chapter exam.
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Practice Final Exam
Test your knowledge of the entire course with a 50 question practice final exam.
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