Ch 15: Energy Changes in Chemical Reactions

About This Chapter

You can refresh your knowledge of energy changes in chemical reactions by working through the lessons in this chapter. You can get ready for a class discussion with the help from our professional instructors.

Energy Changes in Chemical Reactions- Chapter Summary

With the lessons in this chapter, you will learn and review information about energy changes in chemical reactions. These lessons were designed to help you expand your knowledge of chemistry topics. You can learn about the difference between exothermic and endothermic reactions. This chapter will help you to:

  • Analyze reaction coordinate diagrams
  • Recall the parts of an electrochemical cell
  • Identify the two types of voltaic cells
  • Review two future energy sources

The self-assessment quizzes included with each lesson were designed to give you the chance to gauge your understanding of the information you have learned. After you are done with the lessons, you can take the chapter test that encompasses material from all of the lessons. The resources in this chapter can be used multiple times until you feel comfortable moving forward to the next chapter.

5 Lessons in Chapter 15: Energy Changes in Chemical Reactions
Test your knowledge with a 30-question chapter practice test
Endothermic and Exothermic Reactions

1. 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.

Analyzing Energy With a Reaction Coordinate Diagram

2. Analyzing Energy With a Reaction Coordinate Diagram

In this lesson, we will learn about reaction coordinate diagrams and how they help us analyze energy in reactions. We will learn what the graph means and how to interpret it.

Electrochemical Cells and Electrochemistry

3. Electrochemical Cells and Electrochemistry

Learn to identify the parts of and be able to describe an electrochemical cell, including the electrolyte, electrodes, anodes, and cathodes. Learn how to make a homemade lemon battery and how to diagram an electrochemical cell that will light a light bulb.

Types of Voltaic Cells: Batteries vs. Fuel Cells

4. Types of Voltaic Cells: Batteries vs. Fuel Cells

After completing this lesson, you will be able to explain what a voltaic cell is, and distinguish between two types of voltaic cells: batteries and fuel cells. A short quiz will follow.

New Alternative Energy Sources: OTEC, Hydrogen Gas & Fuel Cells

5. New Alternative Energy Sources: OTEC, Hydrogen Gas & Fuel Cells

In this lesson you will learn about two potential future alternative energy sources: OTEC and hydrogen fuel cells. Discover the benefits and drawbacks of each, and then test your new knowledge with a quiz following the lesson.

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

Earning College Credit

Did you know… We have over 200 college courses that prepare you to earn credit by exam that is accepted by over 1,500 colleges and universities. You can test out of the first two years of college and save thousands off your degree. Anyone can earn credit-by-exam regardless of age or education level.

To learn more, visit our Earning Credit Page

Transferring credit to the school of your choice

Not sure what college you want to attend yet? has thousands of articles about every imaginable degree, area of study and career path that can help you find the school that's right for you.