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An insulated beaker with negligible mass contains 0.250 kg of water at 75.0°C. How many kilograms of ice at -20.0°C must be dropped into the water to make the final temperature of the system 40.0°C?
20. Heat and Temperature
Calorimetry with Temperature and Phase Changes
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A 65 cm^3 block of iron is removed from an 800°C furnace and immediately dropped into 200 mL of 20°C water. What fraction of the water boils away?
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