A-LevelChemistryChemical energeticsMay/June 2025Paper 1 Q61 Mark
Some standard enthalpy of combustion data are given. [Table with substance (C(s), H2(g), CH3OH(l)) and standard enthalpy change of combustion/kJ mol⁻¹ (-394, -286, -726)] Using these data, what is the enthalpy change of formation of methanol?
A-240 kJ mol⁻¹
B-46 kJ mol⁻¹
C46 kJ mol⁻¹
D240 kJ mol⁻¹
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The correct answer is A. This question tests the candidate's understanding of chemical energetics within the Chemistrysyllabus. The examiner's mark scheme requires...
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