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Which of the following best represents the internal energy per mole of a noble gas?

$(A) \large\frac{3}{2}$$RT \quad (B) \large\frac{1}{2}$$RT \quad (C) \large\frac{2}{3}$$RT \quad (D) \large\frac{1}{3}$$RT$
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Answer: $\large\frac{3}{2}$$RT$
Noble gases are monoatomic.
For monoatomic gases, $pV = \large\frac{2}{3}$$ \text{Internal Energy}$
$\Rightarrow$ Internal Energy $U =\large\frac{3}{2}$$pV = \large\frac{3}{2}$$nRT$
answered Jul 29, 2014 by balaji.thirumalai
 

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