A 200 g of copper, initially at 300o C, is dropped into a 350 g of water contained in a 355 g aluminum calorimeter; the water and the calorimeter are initially 15o C. If 25 g iron stirrer is used to bring the mixture into thermal equilibrium, what is the final temperature of the system? ( Assume that the stirrer is initially at 15o C.) Specific heat of copper and aluminum are 0.092 cal/g oC and 0.215 cal/g oC respectively. Also specific heat of water is 1.0 cal/g oC and that of iron is 0.106 cal/g oC. )
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