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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

4 RT

B

15 RT

C

9 RT

D

11 RT

Text Solution

Verified by Experts

The correct Answer is:
D
`U = 2 ((n_(1))/(2)RT) + 4(n_(2)/(2)RT)`
For `O_(2) , n_(1) = 5 and for Ar , n_(2)=3`
`:. U = 2(5/2 RT)+4(3/2 RT) = 11RT`.
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PRADEEP-BEHAVIOUR OF PERFECT GAS & KINETIC THEORY-Multiple choice questions-I
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