Consider the Following Reaction and Its Corresponding Enthalpy

question 13

Multiple Choice

Consider the following reaction and its corresponding enthalpy:
2 Mg (s) + O₂ (g) →2 MgO (s) D H ° _rxn = - 1204 kJ/mol What amount of heat is exchanged when 5.00 grams of magnesium metal reacts at constant pressure?

• A) - 124 kJ
• B) - 248 kJ
• C) - 3.01×10³ kJ
• D) 7.32×10⁴ kJ
• E) 1.44×10⁵ kJ

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