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

Question

The average translational kinetic energy of O2 molecules (relative molar mass 32) at a particular temperature is 0.048 eV. The translational kinetic energy of N2 molecules (relative molar mass 28) in eV at the same temperature is (A) 0.0015 (B) 0.003 (C) 0.048 (D) 0.768

Tardigrade Admin · Accepted Answer

Average translational K.E. of a molecule = (3/2) kT . It depends on temperature and not on molecular mass. Hence average translational K.E. for N2 will also be 0.048 eV.

Q. The average translational kinetic energy of $O_{2}$ molecules (relative molar mass 32) at a particular temperature is 0.048 eV. The translational kinetic energy of $N_{2}$ molecules (relative molar mass 28) in $e V$ at the same temperature is

0.0015

0.003

0.048

0.768

Average translational K.E. of a molecule $= \frac{3}{2} k T$ . It depends on temperature and not on molecular mass. Hence average translational K.E. for N $_{2}$ will also be 0.048 eV.

Q. The average translational kinetic energy of O2​ molecules (relative molar mass 32) at a particular temperature is 0.048 eV. The translational kinetic energy of N2​ molecules (relative molar mass 28) in eV at the same temperature is