A) 0
B) \[\frac{5}{2}nRT\]
C) \[\frac{3}{2}\,nRT\]
D) \[\frac{1}{2}\,nRT\]
Correct Answer: D
Solution :
\[{{u}_{i}}=N\,\frac{5}{2}RT\] \[{{u}_{f}}\,=2n\,\frac{3}{2}\,RT+(N-n)\frac{5}{2}RT\] \[=\frac{1}{2}\,nRT\,+\frac{5}{2}\,nRT\] \[\Delta u=Q=\frac{1}{2}nRT\]
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