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Dissolving 3.00 g of CaCl2(s) in 200.0 g of water in a calorimeter at 22.4 °C...

Dissolving 3.00 g of CaCl2(s) in 200.0 g of water in a calorimeter at 22.4 °C causes the temperature to rise to 25.8 °C. What is the approximate amount of heat involved in the dissolution, assuming the heat capacity of the resulting solution is 4.18 J/g °C? Is the reaction exothermic or endothermic?

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