For various thermodynamic processes, match the following -
Column-IColumn-II(i) Isochoric Heating[A…

Question

For various thermodynamic processes, match the following -
Column-IColumn-II(i) Isochoric Heating[A] Δ Q > O(ii) Isobaric Expansion[B] Δ W > O(iii) Isothermal Expansion[C] Δ U > O(iv) Adiabatic Expansion[D] Δ W > O

CGP EDU Academic Team · Accepted Answer

The correct answer is A. Step 1: Understand the processes listed in Column-I. Isochoric heating means the volume is constant, thus no work is done ($ΔW = 0$). However, heat is added, leading to an increase in internal energy, resulting in $ΔQ > 0$.Step 2: Analyze each thermodynamic process in Column-I against Column-II.(i) Isochoric Heating: Because the volume remains constant, heat must be added to increase the internal energy. Thus, ΔQ > 0 matches with [A].(ii) Isobaric Expansion: In this process, pressure remains constant while the volume increases, which means work is done by the system. Therefore, ΔW > 0 matches with [B].(iii) Isothermal Expansion: Here, the temperature remains constant. For an ideal gas, internal energy depends only on temperature. Therefore, since the temperature does not change, ΔU = 0, meaning ΔU > 0 does not apply, it cannot match with [C]. Instead, ΔW > 0(iv) Adiabatic Expansion: In this case, the system expands without heat exchange with the surroundings, resulting in work being done by the system, thus ΔW > 0 matches with [D].Conclusion: The correct matching is:  (i) with [A], (ii) with [B], (iii) with (not listed), (iv) with [D]. Therefore, the answer for isochoic heating is A as the correct answer.

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Column-I	Column-II
(i) Isochoric Heating	[A] Δ Q > O
(ii) Isobaric Expansion	[B] Δ W > O
(iii) Isothermal Expansion	[C] Δ U > O
(iv) Adiabatic Expansion	[D] Δ W > O

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