NEET | 2017KTGEasy

Question

A gas mixture consists of 2 moles of O2 and 4 moles of Ar at temperature T. Neglecting all vibrational modes, the total internal energy of the system is :-

Options

A.

15 RT

B.

9 RT

C.

11 RT

D.

4 RT

Solution

U = f2nRT
Utotal = 52(2)RT +32(4)RT
Utotal = 11RT

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