JEE Main · PhysicsMedium
A gas mixture consists of 2 moles of oxygen and 4 moles of argon at temperature $T$. Neglecting vibrational modes, the total internal energy of the system is
- A.$11RT$
- B.$15RT$
- C.$9RT$
- D.$4RT$
Show correct answer & step-by-step solution
Correct answer: A — $11RT$
Solution
The internal energy is given by . For oxygen (diatomic), , so . For argon (monatomic), , so . Total energy is $5RT + 6RT = 11RT$.
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