At constant volume, 4 m o l of an ideal gas when heated from 300 K to 500 K changes its internal energy by 5000 J . The molar heat capacity at constant volume is ________

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For ideal gas : Δ U = nC V T 2 − T 1 ⇒ 5000 = 4 × C V [ 500 − 300 ] ⇒ C V = 5000 800 = 6.25 J mole − 1 K − 1

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