Question

Arrange the following molecules in order of increasing average molecular speed: He at 467K, O3 at 311K, Ne at 396K, He at 396K.

1 = slowest, 4 = fastest

Answer 1

Molecules are arranged from slowest to fastest based on their molecular weights and temperatures, with O₃ at 311K being the slowest and He at 467K being the fastest.

Step-by-step explanation:

To arrange the molecules He at 467K, O₃ at 311K, Ne at 396K, and He at 396K in order of increasing average molecular speed, we need to consider both their molecular masses and the temperatures they are at. According to kinetic molecular theory, at a given temperature, lighter molecules move faster than heavier molecules, and molecules at a higher temperature move faster than those at a lower temperature. Since O₃ has a much higher molecular mass compared to He and Ne, it will generally have a slower speed despite its temperature. Helium at 396K will be slower than helium at 467K because they are the same molecule at different temperatures.

The order from slowest to fastest is as follows:

1. O₃ at 311K
2. Ne at 396K
3. He at 396K
4. He at 467K