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1. A 78.0 g piece of metal at 89.0°C is placed in 125 g of water...

1. A 78.0 g piece of metal at 89.0°C is placed in 125 g of water at 21.0°C contained in a calorimeter. The metal and water come to the same temperature at 27.0°C.

- How much heat (in J) did the metal give up to the water? (Assume the specific heat of water is 4.18 J/g·°C across the temperature range.)

- What is the specific heat (in J/g·°C) of the metal?

2. A 0.529 g sample of KCl is added to 62.2 g of water in a calorimeter. If the temperature decreases by 1.16°C, what is the approximate amount of heat (in J) involved in the dissolution of the KCl, assuming the heat capacity of the resulting solution is 4.18 J/g°C? Is the reaction endothermic or exothermic?

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