JEE Mains · Physics · STD 11 - 11. thermodynamics
A gas mixture consists of \(8\) moles of argon and \(6\) moles of oxygen at temperature \(T\). Neglecting all vibrational modes, the total internal energy of the system is _______.
- A \(29 \mathrm{RT}\)
- B \(20 \mathrm{RT}\)
- C \(27 \mathrm{RT}\)
- D \(21 \mathrm{RT}\)
Answer & Solution
Correct Answer
(C) \(27 \mathrm{RT}\)
Step-by-step Solution
Detailed explanation
\(\mathrm{U}=\mathrm{nC}_{\mathrm{V}} \mathrm{T}\) \(\Rightarrow \mathrm{U}=\mathrm{n}_1 \mathrm{C}_{\mathrm{V}_1} \mathrm{~T}+\mathrm{n}_2 \mathrm{C}_{\mathrm{V}_2} \mathrm{~T}\)…
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