A 0.25 kg piece of metal at 100 °C is dropped into 0.40 kg of water at 18 °C. The mixture settles at 22.5 °C. What is the specific heat of the metal? (cwater = 4186 J kg⁻¹K⁻¹; ignore the container.)

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

A $0.25\ \text{kg}$ piece of metal at $100\ ^\circ\text{C}$ is dropped into $0.40\ \text{kg}$ of water at $18\ ^\circ\text{C}$ . The mixture settles at $22.5\ ^\circ\text{C}$ . What is the specific heat of the metal? ( $c_{\text{water}} = 4186\ \text{J kg}^{-1}\text{K}^{-1}$ ; ignore the container.)

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← 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?How much heat turns 0.20 kg of ice at -15 °C into water at 25 °C? (Ice 2100 J kg⁻¹K⁻¹, water 4186 J kg⁻¹K⁻¹; latent heat of fusion 3.34 × 10⁵ J/kg.) →

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