# How many joules of heat are necessary to melt 500 g of ice at its freezing point?

May 18, 2018

$\text{40 kcal}$
Heat required to melt $\text{1 g}$ of ice at $\text{0°C}$ is approximately $\text{80 cal}$. This is also called latent heat of fusion of ice.
For $\text{500 g}$ of ice
$\text{Q" = 500 cancel"g" × 80 "cal"/cancel"g" = "40000 cal = 40 kcal}$