A-LevelChemistryChemical energeticsOct/Nov 2020Paper 1 Q81 Mark
Which pair of enthalpy changes will always share the same sign (i.e. both are always exothermic or both are always endothermic)?
Aenthalpy change of atomisation and enthalpy change of neutralisation
Benthalpy change of atomisation and enthalpy change of solution
Centhalpy change of combustion and enthalpy change of hydration
Denthalpy change of solution and enthalpy change of hydration
✓ Correct Answer
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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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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