Butanol is a liquid fuel - Edexcel - GCSE Chemistry - Question 1 - 2023 - Paper 2
Question 1
Butanol is a liquid fuel.
A student investigated the mass of butanol needed to increase the temperature of 100 cm³ of water by 1 °C.
The student used the following... show full transcript
Worked Solution & Example Answer:Butanol is a liquid fuel - Edexcel - GCSE Chemistry - Question 1 - 2023 - Paper 2
Step 1
(a) Calculate the mass of butanol burned to increase the temperature of the water.
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Answer
To calculate the mass of butanol burned, we need to find the difference in mass of the spirit burner before and after the experiment:
Mass of butanol burned=Mass at start−Mass at end
Substituting the values:
Mass of butanol burned=134.67g−133.59g=1.08g
Thus, the mass of butanol burned is 1.08 g.
Step 2
(b) Identify two factors that could be improved to make the results more accurate.
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Answer
Distance from beaker to spirit burner: Keeping the burner closer to the beaker can reduce heat loss and improve efficiency.
Size of wick: A larger wick may provide a steadier flame, reducing variations in heat output.
Step 3
(c) Suggest two ways to improve the experiment.
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Answer
Move beaker closer to spirit burner: This reduces heat loss to the surroundings and increases heating efficiency.
Use a lid: Placing a lid on the beaker minimizes evaporation and maintains water temperature more effectively.
