# Ch 4: Ideal Gas Law & Kinetic Theory

### About This Chapter

## Ideal Gas Law & Kinetic Theory - Chapter Summary

Follow along with our expert physics instructors to review kinetic theory and the ideal gas laws. This collection of simple and entertaining lessons simplifies complex physics concepts, such as the gas constant, Dalton's law of partial pressures, ideal gas law deviations and much more. You can also learn how to use these theories and laws to solve a variety of physics problems. Each lesson comes with a short quiz, and we've included a chapter exam to help you check your understanding of the material. These resources are available at any time of day or night, and you can study on any computer or mobile device. By the end of the chapter, you should be able to:

- Summarize the kinetic theory of matter, the ideal gas law, the gas constant and Dalton's law of partial pressures
- Explain what the kinetic theory of matter says about the states of matter and the properties of gases
- Calculate pressure, volume, temperature and gas quantity using the ideal gas law
- Solve problems involving the ideal gas law
- Understand how real gases deviate from the ideal gas laws

### 1. The Kinetic Theory of Matter: Definition & The Four States of Matter

The kinetic theory of matter states that all matter is comprised of minuscule particles in random motion, with space between each particle. Learn about the definition of the kinetic theory of matter, phase changes, and the four states of matter.

### 2. The Kinetic Molecular Theory: Properties of Gases

Ideal gas molecules do not repel or attract each other, and professionals, like engineers, who work with gases need to recognize which gases are ideal. Learn how the kinetic molecular theory helps scientists and others understand the properties of ideal gases.

### 3. The Ideal Gas Law and the Gas Constant

The ideal gas law can be used to predict real gas behavior. Learn about this law, including its equation, and understand how to use the equation to solve a gas problem. Explore the concepts used by the ideal gas law such as the gas constant.

### 4. Using the Ideal Gas Law: Calculate Pressure, Volume, Temperature, or Quantity of a Gas

The equation for the ideal gas law is PV = nRT. Learn how to use this equation to solve for the pressure in the atmosphere, volume in liters, number of particles in moles, the temperature in Kelvin, and the ideal gas constant.

### 5. Ideal Gas Law Problems & Solutions

The ideal gas law has four variables in it: moles, temperature, pressure, and volume. In this lesson, we will practice using the ideal gas law to calculate pressure, temperature and volume of gases.

### 6. Dalton's Law of Partial Pressures: Calculating Partial & Total Pressures

Dalton's Law of Partial Pressures is used to calculate the partial and the total pressures of gases. Explore how gases behave after being mixed together and discover how to apply Dalton's Law to scientific problems concerning water vapor.

### 7. Real Gases: Deviation From the Ideal Gas Laws

The behavior of real gases requires the use of a modified equation. Understand the ideal gas law, examine gas behavior assumptions, the Van Der Waals equation, and the deviations from the ideal gas laws.

### Earning College Credit

Did you know… We have over 220 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

### Other Chapters

Other chapters within the Physics 112: Physics II course

- Energy Transfers in Physics
- Heat Transfer & Interaction
- The Basics of Thermodynamics
- Light & Electromagnetic Waves
- Mirrors & Lenses in Geometric Optics
- Basics of Electrostatics
- Magnetism Basics
- Series, Parallel & Combined Circuits
- Capacitors, Inductors & Alternating Current
- Modern Quantum Theory
- Basic Nuclear Physics
- General & Special Relativity
- Studying for Physics 112