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Which one of the following statements is NOT true about the effect of an increase in temperature on the distribution of molecular speeds in a gas?

  1. A
    The most probable speed increases
  2. B
    The fraction of the molecules with the most probable speed increases
  3. C
    The distribution becomes broader
  4. D
    The area under the distribution curve remains the same as under the lower temperature

Solution & Step-by-step Explanation

When temperature increases:The most probable speed () shifts to a higher value. (True)The curve flattens and becomes broader. (True)The total area under the curve represents the total fraction of molecules, which is always (constant). (True)Because the curve flattens, the fraction of molecules possessing the most probable speed actually decreases. (False)

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Try it yourself before checking the explanation above.

Which one of the following statements is NOT true about the effect of an increase in temperature on the distribution of molecular speeds in a gas?
A
The most probable speed increases
B
The fraction of the molecules with the most probable speed increases
C
The distribution becomes broader
D
The area under the distribution curve remains the same as under the lower temperature

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States of MatterKinetic Theory of GasesMolecular Speeds

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