Question

what is translational energy of modes

Answer 1

Translational K.E. describes the random movement through space of the molecules in the system. Absolute temperature, K, is a measure of the average translational kinetic energy of a system. The larger the molecule, the more of these modes will exist.

Answer 2

Absolute temperature, K, is a measure of the average translational kineticenergy of a system. The larger the molecule, the more of these modeswill exist. For a molecule with N atoms, there will be 3N modes. ... This means that for monatomic species, like He, there will only be translational kineticenergy.