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Which of the following statements is incorrect regarding how raising the temperature affects the distribution of molecular speeds in a gas?

1. The total area under the speed distribution curve stays unchanged compared with that at the lower temperature
2. The speed distribution spreads out more
3. The proportion of molecules having the most probable speed increases
4. The most probable speed shifts to a higher value

Correct answer: The proportion of molecules having the most probable speed increases

Solution

As temperature increases, the distribution of molecular speeds broadens, meaning that while the most probable speed increases, the proportion of molecules at that speed actually decreases. Therefore, option C is incorrect.

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