Photo AI
The specific latent heat of fusion for lead is 24,500 J/kg - OCR Gateway - GCSE Physics - Question 15 - 2021 - Paper 1
Question 15
The specific latent heat of fusion for lead is 24,500 J/kg. Calculate the thermal energy required for 0.2 kg of lead to melt. Use an equation from the data sheet t... show full transcript
Worked Solution & Example Answer:The specific latent heat of fusion for lead is 24,500 J/kg - OCR Gateway - GCSE Physics - Question 15 - 2021 - Paper 1
Step 1
Calculate the thermal energy required for 0.2 kg of lead
Answer
To find the thermal energy required to melt a given mass of a substance, we can use the formula:
where:
- is the thermal energy (in joules)
- is the mass (in kg)
- is the specific latent heat of fusion (in J/kg)
For this question:
Substituting the values into the equation,
Thus, the thermal energy required to melt 0.2 kg of lead is 4900 J.