For Which One of the Following Reactions Is the Value

question 13

Multiple Choice

For which one of the following reactions is the value of ΔH°_rxn equal to ΔH°_f for the product?

• A)2Ca (s) + O₂ (g) → 2CaO (s)
• B)C₂H₂ (g) + H₂ (g) → C₂H₄ (g)
• C)2C (graphite) + O₂ (g) → 2CO (g)
• D)3Mg (s) + N₂ (g) → Mg₃N₂ (s)
• E)C (diamond) + O₂ (g) → CO₂ (g)