What is the average distance between atoms (interatomic distance) in water ? Using the data from above examples.

Explanation

A given mass of water in vapour state has `1.6710^3` times the volume of the same mass of water in liquid state (Ex. 13.1). This is also the increase in the amount of volume available for each molecule of water. When volume increases by `10^3 `times the radius increases by `V^(1/3)` or 10 times, i.e., 10 2 Å = 20 Å. So the average distance is 2 20 = 40 Å.