Select the correct Match LIST-I (Process) LIST -II (kJ) (I) Isothermal reversible ( 1mole ideal gas, T = 300K, 2dm 3 to 20dm 3 ) Calculate |w| (A) 8.32 (II) Isothermal irreversible [3 KPa, 1m 3 to 3m

Question

Select the correct Match

LIST-I (Process)	LIST -II (kJ)
(I) Isothermal reversible ( 1mole ideal gas, T = 300K, 2dm³ to 20dm³) Calculate \|w\|	(A) 8.32
(II) Isothermal irreversible [3 KPa, 1m³ to 3m³] calculate \|w\|	(B) 6
(III) 1 mole gas undergoes constant pressure process in which change in temperature is 400K, Cp = 5R/2, $Δ H$ will be	(C) 4
(IV) 1 mole ideal gas having Cv=3R/2 and $Δ T$ = 320K, calculate $Δ U$	(D) 5.74

TestHub · Accepted Answer

(I) w = − n RT ln ( V 1 ​ V 2 ​ ​ ) = − 1 × 1000 8.314 ​ × 300 × ln ( 2 20 ​ ) = − 5.74 KJ (II) w = − P ext ​ ( V 2 ​ − V 1 ​ ) = − 3 × 1 0 3 Pa × ( 3 − 1 ) = − 6 KJ (III) Δ H = 2 × 1000 1 × 5 × 8.314 ​ × 400 = 8.32 KJ (IV) Δ U = nC v ​ Δ T = 2 × 1000 1 × 3 × 8.314 ​ × 320 = 3.99 ≃ 4 KJ

Chemistry - Thermodynamics - I Question with Solution | TestHub

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