A gas mixture consists of 2 moles of O_2 and 4 moles of Ar at temperature T . Neglecting all vibrational modes, the total internal energy of the syste - Physics MCQ NEET (UG) 2017 2026 | ExamTest.live

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

Solution & Step-by-step Explanation

Internal energy U = n \frac{f}{2} RT .For O_{2} (diatomic), f = 5 : U_{1} = 2 \times \frac{5}{2} RT = 5 RT .For Ar (monatomic), f = 3 : U_{2} = 4 \times \frac{3}{2} RT = 6 RT .Total internal energy U_{total} = 5 RT + 6 RT = 11 RT .

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

15 RT

9 RT

11 RT

4 RT

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