Figure 5 shows the apparatus used to investigate the melting of some crushed ice - Edexcel - GCSE Physics - Question 3 - 2023 - Paper 2
Question 3
Figure 5 shows the apparatus used to investigate the melting of some crushed ice.
(a) (i) Suggest one safety precaution needed when using the electrical heater.
(i... show full transcript
Worked Solution & Example Answer:Figure 5 shows the apparatus used to investigate the melting of some crushed ice - Edexcel - GCSE Physics - Question 3 - 2023 - Paper 2
Step 1
Suggest one safety precaution needed when using the electrical heater.
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Answer
One safety precaution is to not touch the heater when it is switched on to avoid burns.
Step 2
Suggest one way of heating the crushed ice without using electricity.
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Answer
One way to heat the crushed ice is to use a Bunsen burner.
Step 3
Describe what happens to the crushed ice during the next 15 minutes.
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Answer
During the next 15 minutes:
From P to Q, the temperature of the crushed ice increases as it heats up but remains below 0°C until all the ice has begun to melt.
From Q to R, the temperature of the mixture of ice and water remains constant at 0°C, indicating a phase change.
From R to S, once all the ice has melted, the temperature of the water begins to increase.
Step 4
Calculate the volume, V₂, of the bubble near the surface.
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Answer
Using the equation:
V2=P2P1×V1
Substituting the values:
V₂ = \frac{1.65}{1.07} \approx 1.54 \text{ litres} $$
Thus, the volume of the bubble near the surface is approximately 1.54 litres.
