For Which of the Following Reaction(s) Is the Enthalpy Change

question 51

Multiple Choice

For which of the following reaction(s) is the enthalpy change for the reaction not equal to ΔH°_f of the product?
I. 2H(g) → H₂(g)
II. H₂(g) + O₂(g) → H₂O₂(l)
III. H₂O(l) + O(g) → H₂O₂(l)

• A) I and III
• B) III only
• C) II and III
• D) II only
• E) I only

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