A-LevelChemistryChemical energeticsFeb/Mar 2022Paper 1 Q81 Mark
The equation for reaction 1 is shown. reaction 1 C₆H₁₂O₆ → 2CO₂ + 2C₂H₅OH ΔH/kJ mol⁻¹ C₆H₁₂O₆ a C₂H₅OH b What is the correct expression for the enthalpy change of reaction 1?
A+ b
B- b
C+ 2b
D- 2b
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The correct answer is D. This question tests the candidate's understanding of chemical energetics within the Chemistrysyllabus. The examiner's mark scheme requires...
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Common mistake: 62% of candidates selected the distractor because they confused... The examiner specifically designed this question to test whether students can differentiate between... To secure full marks, candidates must demonstrate...
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