How the physical properties of hydrocarbons change with molecule size
2 marks · EasyA scientist finds that a sample of kerosene starts to boil at 170 C, while a sample of diesel from the same crude oil boils at 280 C. Calculate the difference in boiling points between these two fractions.
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110 °C (±0)
Common mistakes: 170 - 280 = -110
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Marking points
M1 · 1 mark · Subtracts kerosene boiling point from diesel boiling point: 280 - 170.
A1 · 1 mark · Correct answer: 110 (°C). (follow-through)
Worked solution