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8. A gas mixture consists of 2 moles of oxygen and 4 moles argon at temperature T. Neglecting all vibrational modes, the total internal energy of the system is

(a)  4 RT                                    (b)  15 RT

(c)   9 RT                                    (d)  11 RT

Answer-d

(3)

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(a)      – 5 J (b)  – 10 J (c)   – 15 J (d)  – 20 J Answer-a (118)

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