Which of the Following Chemical Equations Does Not Correspond to a Standard

question 1

Multiple Choice

Which of the following chemical equations does not correspond to a standard molar enthalpy of formation?

• A) Mg(s)+ C(s)+ 3/2 O₂(g)→ MgCO₃(s)
• B) C(s)+ 1/2 O₂(g)→ CO(g)
• C) N₂(g)+ O₂(g)→ 2 NO(g)
• D) N₂(g)+ 2 O₂(g)→ N₂O₄(g)
• E) H₂(g)+ 1/2 O₂(g)→ H₂O( )

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