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

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,

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