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Which of the following statements about enthalpy change (ΔH) is correct?.
- A.A) ΔH is always positive for exothermic reactions.
- B.B) ΔH is the heat content of a system at constant pressure.
- C.C) ΔH can be measured directly in a calorimeter.
- D.D) ΔH is independent of the reaction pathway.
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