A 01326 G Sample of Magnesium Was Burned in an Oxygen

question 36

Multiple Choice

A 0.1326 g sample of magnesium was burned in an oxygen bomb calorimeter.The total heat capacity of the calorimeter plus water was 5,760 J/°C.If the temperature rise of the calorimeter with water was 0.570°C, calculate the enthalpy of combustion of magnesium. Mg(s) + 1/2O₂(g) $\rarr$ MgO(s)

• A)-3280 kJ/mol
• B)-602 kJ/mol
• C)-24.8 kJ/mol
• D)106 kJ/mol
• E)435 kJ/mol

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