A coffee cup calorimeter contains 125g of water at 24.2C. When 10.5g of KBr ( FW119.00g/mol ), also at 24.2C, is dissolved in the water the temperature decreases to 21.1C. What is the energy change in kJ/mol when 1 mole of KBr dissolves. You may assume that no heat is transferred to or from the surroundings or the calorimeter and that the heat capacity of the solution is 4.184J/(gC). A. 1.62kJ/mol B. 11.0kJ/mol C. 18.4kJ/mol D. 125kJ/mol