Which needs more heat: melting $1\ \text{kg}$ of ice at $0\ ^\circ\text{C}$, or boiling away $0.2\ \text{kg}$ of water at $100\ ^\circ\text{C}$? Use $3.34 \times 10^{5}\ \text{J/kg}$ and $2.26 \times 10^{6}\ \text{J/kg}$.