A) 20 RT
B) 12 RT
C) 4 RT
D) 15 RT
Correct Answer: D
Solution :
| [d] Here, oxygen molecule has three translational and two rotational degree of freedom whereas an argon atom has three translational degree of freedom only. |
| As each translational and rotational degree of freedom corresponds to energy \[\frac{1}{2}\]RT for 1 mole. |
| So total internal energy of the system is |
| \[({{n}_{1}}{{f}_{1}}+{{n}_{2}}{{f}_{2}})\frac{1}{2}RT=\{3(3+2)+5(3)\}\frac{1}{2}RT\]\[=15RT\] |
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