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

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

`4RT`

B

`15RT`

C

`9RT`

D

`11RT`

Text Solution

Verified by Experts

The correct Answer is:
D
`C_(V_("mix")) = (n_(1)C_(V_(1)) + n_(2)C_(V_(2)))/(n_(1) + n_(2)) = ((2)((5)/(2)R) + 4((3)/(2)R))/(2+4) = (11R)/(6)`
`U = (n_(1) + n_(2)) C_(V_("mtx")) T = (6) ((11R)/(6)) T = 11RT`
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ALLEN -GEOMETRICAL OPTICS-EXERCISE - 05 (B)
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