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When a solid dissolves in water, heat may be evolved or absorbed. The heat of dissolution (dissolving) can be determined using a coffee cup calorimeter. In the laboratory a general chemistry student finds that when 12.01 g of BaBr₂(s) are dissolved in 109.80 g of water, the temperature of the solution increases from 23.25 to 25.20 °C. The heat capacity of the calorimeter (sometimes referred to as the calorimeter constant) was determined in a separate experiment to be 1.55 J/°C. Based on the student's observation, calculate the enthalpy of dissolution of BaBr₂(s) in kJ/mol. Assume the specific heat of the solution is equal to the specific heat of water. AHdissolution= kJ/mol Thermometer Cardboard or Styrofoam lid Nested Styrofoam cups Reaction occurs in solution.