About This Chapter
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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? Study.com 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.
Other chapters within the ISC Chemistry: Study Guide & Syllabus course
- Basic Concepts of Chemistry
- Measurement in Chemistry
- Atomic Structure & Models
- Periodic Table & Periodicity
- Representative Elements
- Compounds of Element Groups
- Types of Chemical Bonding
- Covalent Bonds
- Characteristics of Gases
- Properties of Colloids
- Rates of Chemical Reactions
- Redox Reactions
- Organic Compounds in Chemistry
- Chemical Reaction Mechanisms
- Aliphatic & Aromatic Hydrocarbons
- Everyday Chemistry
- Chemistry & the Environment
- Relative Molecular Mass & Mole
- Solid State Structure & Properties
- Chemical Dynamics & Reaction Rates
- Chemical Equilibria
- Ionic Equilibria
- Electrochemistry & Voltaic Cells
- Coordination Compounds
- Chemistry of p-Block Elements
- Chemistry of Transition & Inner-Transition Elements
- Alkyl & Aryl Halides
- Alcohols & Phenols
- Ethers & Carbonyl Compounds
- Cyanides, Isocyanides & Nitro Compounds
- Polymer Basics
- Types of Biomolecules
- ISC Chemistry Flashcards