A $2 \mathrm{k}\mathrm{g}$ copper block is heated to ${\mathrm{500 }}^{\mathrm{o}}\mathrm{C}$ and then it is placed on a large block of ice at ${\mathrm{0 }}^o\mathrm{C}$ . If the specific heat capacity of copper is $\mathrm{400 }\mathrm{J }\mathrm{k}{\mathrm{g}}^{-1}°{\mathrm{C}}^{-1}$  $$and latent heat of fusion of water is $3.5\times {10}^5\mathrm{J} \mathrm{k}{\mathrm{g}}^{-1}$, the amount of ice that can melt is