What Is the Reaction for the Standard Enthalpy of Formation

question 29

Multiple Choice

What is the reaction for the standard enthalpy of formation for Mn₂O₃(s) ? (Mn(s) is the stable form of manganese.)

• A) Mn(s) + 3/4 O₂(g) → 1/2 Mn₂O₃(s)
• B) MnO(s) + MnO₂(s) → Mn₂O₃(s)
• C) 2 Mn(s) + O₃(g) → Mn₂O₃(s)
• D) 2 MnO(s) + 1/2 O₃(g) → Mn₂O₃(s)
• E) 2Mn (s) + 3/2 O₂ (g) → Mn₂O₃(s)

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