Table of contents

1. The Chemical World9m
- The Scientific Method
  9m
2. Measurement and Problem Solving2h 19m
3. Matter and Energy2h 15m
4. Atoms and Elements2h 33m
5. Molecules and Compounds1h 50m
6. Chemical Composition1h 23m
7. Chemical Reactions1h 43m
8. Quantities in Chemical Reactions1h 8m
9. Electrons in Atoms and the Periodic Table2h 32m
10. Chemical Bonding2h 10m
11 Gases2h 7m
12. Liquids, Solids, and Intermolecular Forces1h 11m
13. Solutions3h 1m
14. Acids and Bases2h 14m
15. Chemical Equilibrium1h 27m
16. Oxidation and Reduction1h 33m
17. Radioactivity and Nuclear Chemistry53m

11 Gases

Kinetic Molecular Theory

Introduction to Chemistry

11 Gases

Kinetic Molecular Theory

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Multiple Choice

Based on the kinetic-molecular theory, which of the following is/are true?
I.At a given temperature, all gases have the same average kinetic energy.
II.At a given temperature, different gases have the same average velocities.
III.The average kinetic energy is proportional to the absolute temperature.

I only

II only

I & III only

I, II & III

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Verified step by step guidance

Understand the kinetic-molecular theory: This theory explains the behavior of gases, stating that gas particles are in constant motion and that their kinetic energy depends on temperature.

Analyze statement I: 'At a given temperature, all gases have the same average kinetic energy.' According to the kinetic-molecular theory, the average kinetic energy of gas particles is directly proportional to the absolute temperature, regardless of the type of gas. Therefore, statement I is true.

Analyze statement II: 'At a given temperature, different gases have the same average velocities.' The average velocity of gas particles depends on both the temperature and the mass of the particles. Lighter gas particles move faster than heavier ones at the same temperature, so statement II is false.

Analyze statement III: 'The average kinetic energy is proportional to the absolute temperature.' This is a fundamental aspect of the kinetic-molecular theory, which states that the average kinetic energy of gas particles is directly proportional to the absolute temperature (measured in Kelvin). Therefore, statement III is true.

Conclude which statements are true: Based on the analysis, statements I and III are true, while statement II is false. Therefore, the correct answer is 'I & III only.'