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Part A 

Approximately how long should it take 9.3 kg of ice at 0 °Cto melt when it is placed in a carefully sealed Styrofoam ice chest of dimensions 25 cm x 35 cm × 55 cm whose walls are 2.0 cm thick? Assume that the conductivity of Styrofoam is double that of air and that the outside temperature is 35 °C.

Express your answer using two significant figures.

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