Question

From the following statements, concerning ideal gas at any given temperature $T$, select the incorrect one.

• A. The coefficient of volume expansion at constant pressure is same for all ideal gases.
• B. The average translational kinetic energy per molecule of oxygen gas is $k_{B} T$ ( $k_{B}$ being Boltzmann constant).
• C. In a gaseous mixture, the average translational kinetic energy of the molecules of each component is same.
• D. The mean free path of molecules increases with the decrease in pressure.

Answer 1

Answer: (B)

All statements are correct except the statement given in option (b) and it can be corrected as, The average translational KE per molecule is same for molecules of all gases like here $O _{2}$ and for each molecule it is $\frac{3}{2} k_{B} T$.