A) 4 RT
B) 15 RT
C) 9 RT
D) 11 RT
Correct Answer: D
Solution :
| [d] Total internal energy of system |
| \[={{U}_{oxygen}}+{{U}_{\arg on}}\] |
| \[={{\mu }_{1}}=\frac{{{f}_{1}}}{2}\,RT+{{\mu }_{2}}\frac{{{f}_{2}}}{2}RT\] |
| \[=2\frac{5}{2}RT+4\frac{3}{2}RT=5RT+6RT=11RT\] |
| [as \[{{f}_{1}}=5\] (for oxygen) and \[{{f}_{2}}=3\] (for argon)] |
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