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

question 58

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( \(\ell\) )

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