A gas mixture consists of 2 moles of O2 and 4 moles of Ar

A gas mixture consists of 2 moles of O₂ and 4 moles of Ar at temperature T. Neglecting all vibrational modes, the total internal energy of the system is :-

Internal energy of the system is given by

U =	f	nRT
	2

Degree of freedom
F_diatomic = 5
f_monoatomic = 3
and, number of moles
n(O₂) = 2
n(Ar) = 4

U_total =	5	(2)TR +	3	(4)TR = 11RT
	2		2