How much heat turns $0.20\ \text{kg}$ of ice at $-15\ ^\circ\text{C}$ into water at $25\ ^\circ\text{C}$? (Ice $2100\ \text{J kg}^{-1}\text{K}^{-1}$, water $4186\ \text{J kg}^{-1}\text{K}^{-1}$; latent heat of fusion $3.34 \times 10^{5}\ \text{J/kg}$.)