Short answerEasy2 marks
A solid metal weighing 150 g melts at it's melting point of 800 °C by providing heat at the rate of 100 W. The time taken for it to completely melt at the same temperature is 4 min. What is the specific latent heat of fusion of the metal?
Topic: Specific latent heat of fusion
Previous-year question practice database
Answer
Exam answer
1.6 × 10⁵ J kg⁻¹.
Explanation
Heat supplied = Pt = 100×240 = 24,000 J. L = Q/m = 24,000/0.150 = 160,000 J kg⁻¹.
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