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

Question 57

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( Which of the following chemical equations does not correspond to a standard molar enthalpy of formation? A) Mg(s) + C(s) + 3/2 O<sub>2</sub>(g) → MgCO<sub>3</sub>(s) B) C(s) + 1/2 O<sub>2</sub>(g) → CO(g) C) N<sub>2</sub>(g) + O<sub>2</sub>(g) → 2 NO(g) D) N<sub>2</sub>(g) + 2 O<sub>2</sub>(g) → N<sub>2</sub>O<sub>4</sub>(g) E) H<sub>2</sub>(g) + 1/2 O<sub>2</sub>(g) → H<sub>2</sub>O( ) )

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