8.0 grams of water initially at 100°C are poured into a cavity in a very large block of ice initially at 0°C How many g of ice melt before thermal equilibrium is attained?

Question

Quizplus · Accepted Answer

The heat lost by the water is equal to the heat gained by the ice. The heat lost by the water is:Q = mcΔT = (8.0 g)(4.18 J/g°C)(100°C - 0°C) = 3344 JThe heat gained by the ice is:Q = mL = (m)(334 J/g)Setting these two equations equal to each other, we get:(8.0 g)(4.18 J/g°C)(100°C - 0°C) = (m)(334 J/g)Solving for m, we get:m = 100 gTherefore, 100 g of ice melt before thermal equilibrium is attained.

80 Grams of Water Initially at 100°C Are Poured into a Cavity