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Physics · PYQ NEET UG 2017
हिन्दीA gas mixture consists of 2 moles of \( \text{O}_2 \) and 4 moles of \( \text{Ar} \) at temperature T. Neglecting all vibrational modes, the total internal energy of the system is
Correct answer · Option 4
\( 11\text{ RT} \)
Explanation
Total internal energy \( U = \frac{f_1}{2}n_1 RT + \frac{f_2}{2}n_2 RT = \frac{5}{2}(2)RT + \frac{3}{2}(4)RT = 5RT + 6RT = 11RT \).
