A-LevelChemistryChemical energeticsMay/June 2016Paper 1 Q341 Mark
An ethanol burner can be used to heat water. If appropriate measurements are taken, a value for the enthalpy of combustion of ethanol can be calculated. The equation heat transferred = -mcΔT is used as part of the calculation. Which symbols are correctly described? 1 ΔT is the change in temperature of the water. 2 m is the mass of water used in the experiment. 3 c is the specific heat capacity of ethanol.
A1, 2 and 3 are correct
B1 and 2 only are correct
C2 and 3 only are correct
D1 only is correct
✓ Correct Answer
The correct answer is B. This question tests the candidate's understanding of chemical energetics within the Chemistrysyllabus. The examiner's mark scheme requires...
📋 Examiner Report & Trap Analysis
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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