JEE Mains · Physics · STD 11 - 12 . kinetic theory of gases
A gas mixture consists of \(3\) moles of oxygen and \(5\) moles of argon at temperature \(T\). Assuming the gases to be ideal and the oxygen bond to be rigid, the total internal energy (in units of \(RT\) ) of the mixture is
- A \(11\)
- B \(15\)
- C \(20\)
- D \(13\)
Answer & Solution
Correct Answer
(B) \(15\)
Step-by-step Solution
Detailed explanation
\(u =\frac{ f _{1} n _{1} RT }{2}+\frac{ f _{2} n _{2} RT }{2}\) \(u =\frac{5}{2} \times 3 RT +\frac{3 \times 5 RT }{2}=15 RT\)
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