Chapter 17, Problem 8TE

Which has stronger attractions among its submicroscopic particles: a solid at $25°\text{C}$ or a gas of a different substance at $25°\text{C}$? Explain.

To determine

Which one out of solid at ${25}^0\text{C}$ or gas molecules at ${25}^0\text{C}$ will have stronger forces of attraction.

Answer to Problem 8TE

Solid at ${25}^0\text{C}$ have stronger forces of attraction.

Explanation of Solution

Forces of attraction in any kind of matter depends upon the distance between the molecules of matter. In solids the distance is least between adjacent molecules and hence the forces of attraction between them are maximum. Such high force of attraction among molecules are the reason why the solids are rigid in nature.

In gases molecules are far apart resulting in negligible forces of attraction among the molecules giving them very high fluidity (that is why we are able to move in atmosphere filled with gases).

Conclusion:

Therefore, molecules of solid at ${25}^0\text{C}$ will have highest forces of attraction.