5 moles of an ideal gas at 100 K are allowed to undergo reversible compression till its temperature becomes 200 K . If C V = 28 J K - 1 , calculate ∆ U and ∆ p V for the process. ( R = 8.0 J K - 1 m o l - 1 )

Question

5 moles of an ideal gas at 100 K are allowed to undergo reversible compression till its temperature becomes 200 K . If C V = 28 J K - 1 , calculate ∆ U and ∆ p V for the process. ( R = 8.0 J K - 1 m o l - 1 ), ∆ U = 14 J ; ∆ p V = 0.8 J, ∆ U = 14 kJ ; ∆ p V = 18 kJ, ∆ U = 14 kJ ; ∆ p V = 4 kJ, ∆ U = 2.8 kJ ; ∆ p V = 0.8 kJ

MARKS App · Accepted Answer

Δ U = n C V Δ T = 5 × 28 × 100 = 14000 J = 14 kJ Δ ( P V ) = n R Δ T = 5 × 8 × 100 = 4000 J = 4 k J

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