A cook pours 800 g of water just off the boil, at 85 °C, into 1.2 kg of cold tap water at 15 °C in a large pot. Ignoring the pot, what temperature does the water settle at?

PhysicsEasyHigh School (11–12)Heat & Thermodynamics › Calorimetry and Change of State

A cook pours $800\ \text{g}$ of water just off the boil, at $85\ ^\circ\text{C}$ , into $1.2\ \text{kg}$ of cold tap water at $15\ ^\circ\text{C}$ in a large pot. Ignoring the pot, what temperature does the water settle at?

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