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In an experiment, 300 g of aluminum (with a specific heat of 900 J/kg·K) at 100°C is mixed with 54.0 g of water (4186 J/kg·K) at 20°C, with the mixture thermally isolated.

(a) What is the equilibrium temperature? ___ °C

(b) What is the entropy change of the aluminum? ___ J/K

(d) What is the entropy change of the aluminum-water system? ___ J/K

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