A-LevelChemistryChemical energeticsMay/June 2013Paper 1 Q121 Mark
Propanone has molecular formula C₃H₆O. The enthalpy change of combustion of hydrogen is –286 kJ mol⁻¹. The enthalpy change of combustion of carbon is –394 kJ mol⁻¹. The enthalpy change of formation of propanone is –254 kJ mol⁻¹. Using this information, what is the enthalpy change of combustion of propanone?
A-2644 kJ mol⁻¹
B-2294 kJ mol⁻¹
C-1786 kJ mol⁻¹
D-426 kJ mol⁻¹
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The correct answer is C. This question tests the candidate's understanding of chemical energetics within the Chemistrysyllabus. The examiner's mark scheme requires...
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