A-LevelChemistryChemical energetics9701/12 · May/June 2016 · 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

B: 1 and 2 only are correct

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Topic: Chemical energetics, A-Level Chemistry (syllabus 9701). Multiple choice, 1 mark.
Source: A-Level Chemistry, May/June 2016 Paper 1 Variant 2, question 34.

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