Question

The density of the vapour of a substance at 1 atm pressure and 500 K is 0.36 kg m^-3. The vapour effuses through a small hole at a rate of 1.33 times faster than oxygen under the same condition.

(a) Determine,

(i) molecular weight

(ii) molar volume

(iii) compression factor (z) of the vapour and 

(iv) which forces among the gas molecules are dominating, the attractive or the repulsive?

(b) If the vapour behaves ideally at 100 K, determine the average translational kinetic energy of a molecule.

Answer 1

(iv) Repulsive forces dominate since the actual density is less than the given density, it was ideal

(b) Average translational kinetic energy of a molecule