Ch 12: Heat, Work & Energy

About This Chapter

With this study chapter, our expert instructors are here to help you master topics on heat, work and energy through brief lessons and self-assessment quizzes. You can increase your comprehension and retention of topics including the relationship of different energy types and the work-energy theorem.

Heat, Work & Energy- Chapter Summary

This chapter will teach you about the components of heat, work and energy including uses for the work-energy theorem, the relationships of energy types and how energy is transferred. You'll examine the three laws of thermodynamics and get information on what Hess's law is used for. By the end of the chapter, the following goals will be met:

  • Learn how to calculate the amount of work that needs to be done
  • Define energy
  • Recall the relationship between the different types of energy
  • Explore the different types of work
  • Explain the laws of thermodynamics
  • Outline the energy flow
  • Identify the formula for thermal equilibrium
  • Describe the concept of absolute entropy
  • Comprehend Hess's law

The brief and comprehensive lessons will walk you through all of the concepts in an easy to understand manner. Once you feel that you have studied a lesson completely, you can take the lesson quiz. These quizzes are multiple-choice and self-assessing, offering quick feedback so you know what your strengths and weaknesses are. The quiz results also provide links you can use to go back to the part of the lesson that explains the topic you missed on the quiz.

14 Lessons in Chapter 12: Heat, Work & Energy
Test your knowledge with a 30-question chapter practice test
Work: Definition, Characteristics, and Examples

1. Work: Definition, Characteristics, and Examples

Pushing a wall all day may feel like work, but unless you get that wall moving you're not doing any work according to the rules of physics. In this video lesson, you'll learn how work is defined as well as how to calculate the amount of work done on an object.

What is Energy? - Definition and Significance in Nature

2. What is Energy? - Definition and Significance in Nature

This lesson describes the nature of energy and how it is transferred from one source into another. Additionally, it will describe the significance of energy in natural systems.

Kinetic Energy to Potential Energy: Relationship in Different Energy Types

3. Kinetic Energy to Potential Energy: Relationship in Different Energy Types

This video defines and describes kinetic and potential energy. You'll learn how different types of energy can be classified as potential and kinetic. You'll also find out how kinetic and potential energy are transformed.

Work-Energy Theorem: Definition and Application

4. Work-Energy Theorem: Definition and Application

Work and energy are closely related in physics. In this lesson, you'll learn what that relationship is as well as how we can apply it to various situations.

Types of Work: Reversible & Irreversible

5. Types of Work: Reversible & Irreversible

Chemical reactions can produce work. In this lesson, we will learn how this work occurs and the two types of work, reversible and irreversible. We will also compare reversible and irreversible work.

State Functions in Thermochemistry

6. State Functions in Thermochemistry

This lesson defines state functions and explains why state functions are so useful in thermochemistry and thermodynamics. You'll also see a few examples of common state functions.

First Law of Thermodynamics: Law of Conservation of Energy

7. First Law of Thermodynamics: Law of Conservation of Energy

This video describes the first law of thermodynamics. Several examples of the application of this law are discussed. The significance of the law and its practical application are discussed as well.

Second Law of Thermodynamics: Entropy and Systems

8. Second Law of Thermodynamics: Entropy and Systems

In this lesson, we'll learn about the second law of thermodynamics. By studying this law, you'll understand how energy works and why we're all moving towards eventual chaos and disorder.

Enthalpy: Energy Transfer in Physical and Chemical Processes

9. Enthalpy: Energy Transfer in Physical and Chemical Processes

This video explores the relationship between chemistry and energy. We learn the general properties of energy and the concepts of temperature and heat. We will learn about energy flow and consider the enthalpy change during chemical reactions.

Spontaneous Reactions & Gibbs Free Energy

10. Spontaneous Reactions & Gibbs Free Energy

In this lesson, we will learn about spontaneous reactions and how we can use Gibbs free energy to predict them. We will remind ourselves about enthalpy and entropy and discuss the importance of temperature and spontaneity.

Thermal Expansion & Heat Transfer

11. Thermal Expansion & Heat Transfer

After watching this video, you will be able to explain how heat transfers by conduction through a slab of material, explain how the shape and size of an object varies as it expands, and solve problems involving conduction. A short quiz will follow.

Thermal Equilibrium: Definition, Formula & Example

12. Thermal Equilibrium: Definition, Formula & Example

In this lesson, you will learn what thermal equilibrium is, discover an equation that relates to thermal equilibrium, and go over an example of its use. A short quiz will follow.

The Third Law of Thermodynamics & Its Application to Absolute Entropy

13. The Third Law of Thermodynamics & Its Application to Absolute Entropy

After completing this lesson, you will be able to explain what the third law of thermodynamics is, and how that relates to the concept of absolute entropy. A short quiz will follow.

Using Hess's Law to Calculate the Change in Enthalpy of a Reaction

14. Using Hess's Law to Calculate the Change in Enthalpy of a Reaction

Want to make sure you don't blow yourself up during a chemical reaction? This lesson will help you avoid this by teaching you Hess's Law. This is one way to calculate the heat transferred, or enthalpy change, of a chemical reaction.

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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