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Which equation is the mathematical statement of the first law?
AΔG = ΔH - TΔS
BΔH = ΔU + pΔV
CΔU = q + w
Dq = C ΔT
Answer & Solution
Correct answer: C. ΔU = q + w
The change in internal energy equals heat added plus work done on the system, which is the first law.
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