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A 500-g aluminum container holds 300 g of water. The water and aluminum are initially at 40°C. A 200-g iron block at 0°C is added to the water. Assume the specific heat of iron is 450 J/kg⋅°C, the specific heat of water 4180 J/kg⋅°C and the specific heat of aluminum is 900 J/kg⋅°C Tf = 38°C
Determine the change in thermal energy of the aluminum.
Express your answer to two significant figures and include the appropriate units.
ΔUAl =
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