A-LevelChemistryChemical energeticsOct/Nov 2022Paper 1 Q161 Mark
Use relevant enthalpy changes from the tables to answer this question. [Table 16.1: Reactions and ∆H/kJ mol⁻¹] [Table 16.2: Bond and bond enthalpy /kJ mol⁻¹] Which value can be calculated for the enthalpy change for the following reaction? 2C(g) + 6H(g) → C2H6(g)
A-2822 kJ mol⁻¹
B-2122 kJ mol⁻¹
C-1998 kJ mol⁻¹
D-1772 kJ mol⁻¹
✓ Correct Answer
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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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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