An aluminum calorimeter with a mass of 100 g contains 250 g of water. The calorimeter and the water are in thermal equilibrium at 10.0 ° C. Two metal blocks are placed in the water. One is a piece of copper from 50.0 g to 80.0 ° C. The other block has a mass of 70.0 g and is originally at a temperature of 100 ° C. The entire system stabilizes at a final temperature of 20.0 ° C. Determine the specific heat. of the unknown sample.

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