Isooctane Is a Good Model Compound for Gasoline

question 28

Multiple Choice

Isooctane is a good model compound for gasoline. When 1.14 g of isooctane (114 g/mol) reacts with excess oxygen in a constant pressure calorimeter, the temperature of the calorimeter increases by 10.0^oC. The heat capacity of the calorimeter is 5.46 kJ/^oC. Determine the molar enthalpy of combustion of isooctane.

• A)(  5,460 kJ/mol)
• B)(  54.6 kJ/mol)
• C)(  5,460 kJ/mol)
• D)(  54.6 kJ/mol)
• E)(  5.46 kJ/mol)

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