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A gas mixture consists of 2 moles of oxy...

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

A

4RT

B

15RT

C

9RT

D

11RT

Text Solution

Verified by Experts

The correct Answer is:
D
`U=n_(1)(f_(1))/(2)RT+n_(2)(f_(2))/(2)RT`
=`2 xx(5)/(2)RT+4xx(3)/(2)RT`
`=5RT+6RT`
`U=11RT`
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