H2P-691

Specific latent heat

H2 Physics · JC 2 · Medium · Specific latent heat

A substance has specific latent heat of fusion

1.8 \times 10^{5}

J kg

^{-1}

. When

0.40

kg of the solid at its melting point is completely melted at constant temperature, the work done by the substance is negligible. Using the first law of thermodynamics, calculate the increase in internal energy of the substance.

$7.2 \times 10^{4}$ J
$4.5 \times 10^{4}$ J
$2.2 \times 10^{5}$ J
$1.8 \times 10^{5}$ J

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