A-LevelChemistryChemical energeticsOct/Nov 2018Paper 1 Q11 Mark
Which statement about enthalpy changes is correct?
AEnthalpy changes of atomisation are always negative.
BEnthalpy changes of combustion are always positive.
CEnthalpy changes of formation are always positive.
DEnthalpy changes of neutralisation are always negative.
✓ Correct Answer
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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