Potassium bromide (10.5g), also at 24.2 degree C, is added to the water, and after the KBr dissolves the final temperature is21.1 degree C. A coffee-cup calorimeter initially contains 125g water at 24.2degree C. Determine the enthalpy change for dissolving the salt in J/g and kJ/mol. Suppose that the specific heat capacity of the solution is 4.18 J/0C .g and that no heat is transferred to the surroundings or to the calorimeter.