Match the column : List - I List - II (A) Adiabatic expansion of an ideal gas against 1 atm (P) Δ S sys 0 (B) Condensation of vapour at normal boiling point equilibrium (Q) Δ U = 0 (C) Adiabatic r

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Match the column : List - I List - II (A) Adiabatic expansion of an ideal gas against 1 atm (P) Δ S sys ​ > 0 (B) Condensation of vapour at normal boiling point equilibrium (Q) Δ U = 0 (C) Adiabatic reversible compression involving an ideal gas (R) Δ S u ni v ​ = 0 (D) Isothermal reversible expansion of an ideal gas (S) w = 0 (T) q = 0

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(A) Adiabatic expansion against 1 atm: For an adiabatic process, $q = 0$ , and the expansion increases system disorder, meaning $Δ S_{sys} > 0$ .

(B) Condensation at boiling point equilibrium: Any process occurring at true phase equilibrium is reversible, which means $Δ S_{u ni v} = 0$ .

(C) Adiabatic reversible compression: The adiabatic condition directly gives $q = 0$ , and because it is specified as a reversible process, $Δ S_{u ni v} = 0$ .

(D) Isothermal reversible expansion: For an ideal gas, isothermal means $Δ U = 0$ , expansion increases disorder so $Δ S_{sys} > 0$ , and reversibility guarantees $Δ S_{u ni v} = 0$ .

List - I	List - II
(A) Adiabatic expansion of an ideal gas against 1 atm	(P) $Δ S_{sys} > 0$
(B) Condensation of vapour at normal boiling point equilibrium	(Q) $Δ U = 0$
(C) Adiabatic reversible compression involving an ideal gas	(R) $Δ S_{u ni v} = 0$
(D) Isothermal reversible expansion of an ideal gas	(S) $w = 0$
	(T) $q = 0$

Chemistry - Thermodynamics - I Question with Solution | TestHub

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