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An insulated calorimeter contains 100 g of water at 10 °C. A salt is added to the solution, causing the temperature to drop by 3 °C. Is the heat of solution for the salt endothermic or exothermic? Group of answer choicesexothermicendothermic

Question

An insulated calorimeter contains 100 g of water at 10 °C. A salt is added to the solution, causing the temperature to drop by 3 °C. Is the heat of solution for the salt endothermic or exothermic? Group of answer choicesexothermicendothermic

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Solution

The heat of solution for the salt is endothermic. This is because the temperature of the water dropped when the salt was added, indicating that heat was absorbed from the water by the salt in order to dissolve it. In an endothermic process, heat is absorbed from the surroundings, which is what happened in this case.

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