The given options are:
(A) ΔH = ΔU − ΔnRT.
(B) ΔU = ΔH + ΔnRT.
(C) ΔH = ΔU + ΔnRT.
(D) ΔH = − ΔU + ΔnRT.
The correct answer is (C) ΔH = ΔU + ΔnRT.
The First Law of Thermodynamics is mathematically represented as ΔH = ΔU + ΔnRT.
ΔH is the heat exchanged between a system and its surroundings.
ΔU is the total change in the internal energy of a system.
ΔnRT is the work done by or on the system.
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