Class 11 Physics — Chapter 5: KINETIC THEORY

What you'll learn

• ▸Molecular Nature of Matter
• ▸Behaviour of Gases and the Ideal Gas Equation
• ▸Postulates of Kinetic Theory of an Ideal Gas
• ▸Pressure Exerted by an Ideal Gas
• ▸Kinetic Interpretation of Temperature
• ▸Law of Equipartition of Energy
• ▸Specific Heat Capacity of Gases
• ▸Mean Free Path

Chapter Summary

--- PAGE 1 --- CHAPTER TWELVE KINETIC THEORY 12.1 Introduction 12.2 Molecular nature of matter 12.3 Behaviour of gases 12.4 Kinetic theory of an ideal gas 12.5 Law of equipartition of energy 12.6 Specific heat capacity 12.7 Mean free path Summary Points to ponder Exercises 12.1 INTRODUCTION Boyle discovered the law named after him in 1661. Boyle, Newton and several others tried to explain the behaviour of gases by considering that gases are made up of tiny atomic particles. The actual atomic theory got established more than 150 years later. Kinetic theory explains the behaviour of gases based on the idea that the gas consists of rapidly moving atoms or molecules. This is possible as the inter-atomic forces, which are short range forces that are important for solids and liquids, can be neglected for gases. The kinetic theory was developed in the nineteenth century by Maxwell, Boltzmann and others. It has been remarkably successful. It gives a molecular interpretation of …

Practice Questions from this Chapter

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1. Describe gas particle motion? Get Solution →
2. Explain gas diffusion? Get Solution →
3. See individual atoms? Get Solution →
4. Who is credited with discovering the law relating the pressure and volume of a gas at constant temperature in 1661? Get Solution →
5. What is the approximate size of a single atom mentioned in the text? Get Solution →
6. What is the numerical value of Avogadro's number (N_A)? Get Solution →
7. What is the value of the universal gas constant (R) in SI units? Get Solution →
8. According to Avogadro's law, equal volumes of all gases at the same temperature and pressure have the same what? Get Solution →

Did you know?

• 💡 Atoms are mostly empty space, yet they form solid objects.
• 💡 The ancient Greek word "atomos" means uncuttable or indivisible.
• 💡 Your body replaces nearly all its atoms every seven years.
• 💡 Gas molecules zoom around faster than the speed of sound.
• 💡 There are more atoms in a glass of water than glasses of water in all oceans.

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