I have question which essentially asks the entropy change of a sword of initial temperature $593\,\mathrm{K}$, mass $1.2\,\mathrm{kg}$ and S.H.C of $0.13\,\mathrm{J}\cdot\mathrm{K}^{-1}\cdot\mathrm{g}^{-1}$, which falls through $1200\,\mathrm{m}$ into a very large lake of temperature $278\,\mathrm{K}$. I have been trying to solve it myself without any success, so any help would be appreciated