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  4. The total internal energy of two mole monoatomic ideal gas at temperature T =300 K will be J. (Given R =8.31 J / mol . K )

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Q. The total internal energy of two mole monoatomic ideal gas at temperature $T =300\, K$ will be $J$.
(Given $R =8.31 \, J / mol . K$ )

JEE MainJEE Main 2022Thermodynamics

Solution:

$U = nC _{ v } T$
$=2 \times \frac{3}{2} R \times 300$
$=900\, R =900 \times 8.31=7479\, J$