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9. (a) Explain the difference between the term ‘specific heat capacity’ and the term ‘specific latent heat’ when applied to heating substances - Edexcel - GCSE Physics - Question 9 - 2022 - Paper 1
Question 9
9. (a) Explain the difference between the term ‘specific heat capacity’ and the term ‘specific latent heat’ when applied to heating substances. (b) Figure 19 shows... show full transcript
Worked Solution & Example Answer:9. (a) Explain the difference between the term ‘specific heat capacity’ and the term ‘specific latent heat’ when applied to heating substances - Edexcel - GCSE Physics - Question 9 - 2022 - Paper 1
Step 1
Explain the difference between the term ‘specific heat capacity’ and the term ‘specific latent heat’
Answer
Specific heat capacity is the amount of heat required to raise the temperature of 1 kg of a substance by 1 degree Celsius (°C). It focuses on temperature change. In contrast, specific latent heat refers to the amount of heat required to change the state of 1 kg of a substance without changing its temperature, such as during melting or boiling. This involves phase changes where temperature remains constant.
Step 2
Explain how the student should then obtain an accurate reading for the final temperature of the water
Answer
After switching off the power supply, the student should allow the system to stabilize for a few minutes. This will ensure that the temperature of the water reaches a uniform level. The student should then carefully read the thermometer to record the final temperature. It's important to avoid parallax errors by taking the reading at eye level and ensuring that the thermometer is fully submerged in the water for an accurate measure.