Diatomic molecules like hydrogen haven energy due to both translational as well as rotational motion. From the equation in kinetic theory `PV=(2)/(3)E,E` is

Options

A. the total energy per uint volume
B. only the translation part of energy because rotational energy is very smaal compared to the trastinal energy
C. only the traslational part of the energy becouse during collisions with the well, pressure ralated to change in linear momentum
D. the translational part of the energy because rotational energies of molecules can be o feither sign and its average over all the molecules is zero

Answer

C

Explanation

In the relation `pV=(2)/(3)` E,E is only the translational part of energy of molecules . This is because during collision of molecules with the walls , pressure exerted relates to change in linear momentum of gas molecules.