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

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A gas mixture consists of 2 moles of oxygen and 4 moles of argon at temperature T. Neglecting all vibrational modes, the total internal energy of the system is
A. `15RT`
B. `9RT`
C. `11RT`
D. `4RT`
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Correct Answer - C
`U=f/2 nRT`
`U_(t otal) = 5/2(2)RT+3/2(4)RT`
`U_(T otal) = 11RT`.
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