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 used.
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Answer
To calculate the mass of butanol used, we can apply the formula:
extmassofbutanol=extmassatstart−extmassatend
Substituting the values from Figure 2:
extmassofbutanol=134.67extg−133.59extg=1.08extg
Thus, the mass of butanol used is 1.08 g.
Step 2
b) Suggest two improvements to the experiment.
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Answer
Distance from beaker to flame/wick/burner: The distance should be minimized to ensure efficient heating of the water.
Size of wick: A wider wick may increase the rate of combustion and heat produced.
Step 3
c) Suggest two ways to prevent heat loss during the experiment.
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Answer
Move beaker closer to spirit burner: This minimizes the distance between the burner and beaker, reducing heat loss to the surroundings.
Insulate the beaker: Using materials that retain heat, such as a metal calorimeter or beaker, can help keep the heat within the system.
