The salt ammonium bromide is soluble in water. When 6.17 g of NH4Br is dissolved in 104.00 g of water, the temperature of the solution decreases from 25.00 to 22.68 °C. Based on this observation, calculate the enthalpy of dissolution of NH4Br (in kJ/mol).
Assume that the specific heat of the solution is 4.184 J/g °C and that the heat absorbed by the calorimeter is negligible.
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