Question

The average translational K.E. of O₂ (molar mass 32) molecules at a particular temperature is 0.048 eV. The translational K.E. of N₂ (molar mass 28) molecules in eV at the same temperature is ……….

(a) 0.0015 

(b) 0.003 

(c) 0.048 

(d) 0.768

Answer 1

(c) 0.048

Average translational K.E. of a gas molecule = \(\frac{3}{2}\) kT. 

It is independent of molecular mass.