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ICSE Class 10 Physics Question 7 of 25

Solved 2025 Question Paper ICSE Class 10 Physics — Question 22

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Question

Question 3(iv)

Calculate the amount of heat absorbed by 200 g of paraffin wax to melt completely at its melting point.

[Specific latent heat of fusion of paraffin wax = 146 Jg⁻¹]

Answer

Given,

Mass of paraffin (m) = 200 g

Specific latent heat of fusion of paraffin (L) = 146 J g⁻¹

Let, required heat be Q.

Then,

Q=mL=200×146=29200 J=29.2 kJ\text Q = \text {mL} = 200 \times 146 = 29200\ \text J = 29.2\ \text {kJ}