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In the kinetic theory of gases, which of the following assumptions is NOT true?

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Question: In the kinetic theory of gases, which of the following assumptions is NOT true?

Options:

  1. Gas molecules are in constant random motion
  2. Gas molecules occupy a negligible volume
  3. Gas molecules experience no intermolecular forces
  4. Gas molecules have significant mass

Correct Answer: Gas molecules have significant mass

Solution: 

In the kinetic theory of gases, it is assumed that gas molecules occupy a negligible volume and have negligible mass compared to the volume they occupy.

In the kinetic theory of gases, which of the following assumptions is NOT true?

Practice Questions

Q1
In the kinetic theory of gases, which of the following assumptions is NOT true?
  1. Gas molecules are in constant random motion
  2. Gas molecules occupy a negligible volume
  3. Gas molecules experience no intermolecular forces
  4. Gas molecules have significant mass

Questions & Step-by-Step Solutions

In the kinetic theory of gases, which of the following assumptions is NOT true?
  • Step 1: Understand the kinetic theory of gases. It explains how gas molecules behave.
  • Step 2: Know the main assumptions of the kinetic theory. These include that gas molecules are in constant motion, they collide elastically, and they occupy a negligible volume.
  • Step 3: Identify the assumption that is NOT true. The assumption that gas molecules have negligible mass is not accurate because they do have mass, even if it's small compared to the volume they occupy.
  • Step 4: Conclude that the assumption about negligible mass is the one that is NOT true in the kinetic theory of gases.
  • Kinetic Theory of Gases – A theory that explains the behavior of gases in terms of the motion of their molecules, including assumptions about volume, mass, and interactions.
  • Assumptions of Kinetic Theory – Key assumptions include that gas molecules are in constant random motion, occupy negligible volume, and do not exert forces on each other except during elastic collisions.
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