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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 the same as it was at the lower temperature
2. The distribution curve spreads out more widely
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, leading to a decrease in the proportion of molecules at the most probable speed, rather than an increase. This is because higher temperatures result in a greater variety of speeds among the molecules.

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