Using Hess's Law, What Is the Standard Enthalpy of Formation

question 5

Multiple Choice

Using Hess's law, what is the standard enthalpy of formation, ΔH°_f of manganese(II) oxide, MnO(s) ?

• A) -520.9 kJ/mol
• B) -396.5 kJ/mol
• C) -384.9 kJ/mol
• D) -147.6 kJ/mol
• E) 24 kJ/mol

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