# How do you calculate the heat required to melt 15 kg of silver?

The heat of fusion (ΔH_("fus")) is the amount of heat required to melt a unit mass of a solid.
q = mΔH_("fus"), where $q$ is the amount of heat and $m$ is the mass of the sample.
q = mΔH_("fus") = 15 kg × $\left(111 \text{ kJ")/(1" kg}\right)$ = 1700 kJ