Question

A jar contains a mixture of nitrogen and oxygen gases. The average kinetic energies of the molecules of nitrogen and oxygen are $E_{1}$ and $E_{2}$ respectively. Then, $\frac{E_{1}}{E_{2}}=$

• A. 6
• B. 28
• C. 32
• D. 1

Answer 1

Answer: (D)

$E=\frac{3}{2} k \cdot T$
$E$ is independent of molecular mass and depends on
temperature only. Thus, $\frac{E_{1}}{E_{2}}=1$ as nitrogen and oxygen when mixed will be at same temperature.