Answer to Question #170104 in Physical Chemistry for sally

Question

1a)Nitrogen molecules made 7.0 x 10^9 collisions in one second at 298K and 1 atm. Determine the molecular diameter for nitrogen molecules.

b) Determine the average distance travelled by nitrogen molecules between collisions in molecular diameter of nitrogen molecule.

Answer 1

Molecular diameter of nitrogen is 364 pm.

If the spacing in the gas is D , then a volume of D 3 is needed for each gaseous molecule. The ratio d 3 / D 3 = volume occupied by a liquid gas/volume occupied by the same mass of the gas. So, the average distance of the gas molecules is the (volume of gas/volume of liquid) 1/3 x the molecular diameter.