The total internal energy of two mole monoatomic ideal gas at temperature $T=300\,K$ will be ...........$J$.
$\text { (Given } R =8.31\,J / mol.K )$
A$7567$
B$7771$
C$7479$
D$8976$
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C$7479$
c $U = nC _{ v } T$
$=2 \times \frac{3}{2} R \times 300$
$=900 R =900 \times 8 \cdot 31=7479\,J$
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