A gas mixture consists of 2 moles of O, and 4 moles of Ar at temperature T. Neglecting all vibrational modes, the totalintemal energv of l.he system is :

Question

$\begin{array}{1 1} (1) 4 \;RT \\ (2) 15 \;RT \\ (3) 9 \;RT \\ (4) 11 \;RT \end{array}$