If 10 gram of ice at 0°C is mixed with 10 gram of water at 40°C. The final mass of water in mixture is (Latent heat of fusion of ice = 80 cal g⁻¹; specific heat of water = 1 cal g⁻¹ °C)
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Question

If 10 gram of ice at 0°C is mixed with 10 gram of water at 40°C. The final mass of water in mixture is (Latent heat of fusion of ice = 80 cal g⁻¹; specific heat of water = 1 cal g⁻¹ °C)

G1 Physics · Accepted Answer

Apply energy conservation. Sensible heat is Q=mcΔT and phase-change heat is Q=mL. Heat lost by hotter parts equals heat gained by colder parts. Evaluating the given data/statements gives B: 15 gram. Therefore the correct answer is B.