When a 6.89-g sample of CaCl2 dissolves in 250 g water in a coffee cup calorimeter, the temperature rises from 22.0 to 26.9 °C. Calculate the change in enthalpy for this solution-making process. Express your answer in kilojoules per mole of salt. (Assume the solution has a density of 1.00 g/mL and specific heat of 4.184 J/g°C.)