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A styrofoam cup calorimeter is used to determine the heat of reaction for the dissolution of an ionic compound in water. When 2.70 g of this compound is added to 250.0 mL of water, the temperature rises from 23.2°C to 28.8°C. Calculate the heat of reaction (qrxn = ?Hrxn) per gram of compound (in kJ/g).

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