The average thermal energy for a mono-atomic gas is: (`k_B` is Boltzmann constant and T, absolute temperature)

The internal energy of one mole mono-atomic gas is

The internal energy of one mole mono-atomic gas is

The de Broglie wavelength of a molecules of thermal energy KT ( K is Boltzmann constant and T is absolute temperture) is given by

The average energy of a molecules of a monoatomic gas at temperature T is (K=Boltzmann constant )

The Boltzmann constant (K_(B)) is:

If P is the pressure,V the volume,R the gas constant,k the Boltzmann constant and T the absolute temperature,then number of molecules in the given mass of the gas is given

Estimate the average thermal energy of a helium atom at (i) room temperature 27^(@)C and (ii) the temperature of the surface of the sun ( 6000K)