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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. The most probable speed increases
2. The distribution curve becomes broader
3. The area under the curve remains the same
4. The peak of the distribution curve shifts to lower speeds

Correct answer: The peak of the distribution curve shifts to lower speeds

Solution

Raising temperature increases the most probable speed and broadens/flattens the curve while the area (total fraction) stays 1. The peak shifts to HIGHER speeds, so the statement that it shifts to lower speeds is the false (not true) one.

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