Question

Two ideal gases, one monoatomic and another diatomic, are having same pressure P, volume V and temperature T. Select the correct option

• A. The translational kinetic energy for monatomic gas is $\frac {3}{2} PV$ but for diatomic gas it is $\frac {5}{2}PV$ .
• B. The translational kinetic energy for both monatomic and diatomic gas will be same.
• C. Average velocity of each molecule of any type of gas will be proportional to $\sqrt{T^5}$ , where $T$ is absolute temperature.
• D. Average energy for one molecule per degree of freedom for monatomic gas is $\frac {1}{2}kT$ but that for diatomic it is $2\times \frac {1}{2}kT$.

Answer 1

Answer: (B)

$E_{Trans} = \frac {3}{2}PV$