A jug holds 0.5 kg of water at 40 °C. What mass of ice at 0 °C must be added so that the ice just all melts and everything ends at 0 °C? Use 3.34 × 10⁵ J/kg for melting ice and 4180 J/(kg °C) for water.

ChemistryHardHigh School (9–10)GeneralStates of Matter › Change of State

A jug holds $0.5\ \text{kg}$ of water at $40\ ^\circ\text{C}$ . What mass of ice at $0\ ^\circ\text{C}$ must be added so that the ice just all melts and everything ends at $0\ ^\circ\text{C}$ ? Use $3.34 \times 10^{5}\ \text{J/kg}$ for melting ice and $4180\ \text{J/(kg}\,^\circ\text{C)}$ for water.

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← How much heat is needed to turn 0.2 kg of ice at 0 °C into water at 30 °C? The latent heat of fusion of ice is 3.34 × 10⁵ J/kg, and 4180 J warms 1 kg of water by 1 °C.Which needs more heat: melting 1 kg of ice at 0 °C, or boiling away 0.2 kg of water at 100 °C? Use 3.34 × 10⁵ J/kg and 2.26 × 10⁶ J/kg. →

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