A coffee cup calorimeter initially contains 125g of water at a temperature of 24.2 o C. When 10.5 g potassium bromide (KBr) is added to the water,...

A coffee cup calorimeter initially contains 125g of water at a temperature of 24.2oC. When 10.5 g

potassium bromide (KBr) is added to the water, the temperature becomes 21.1oC. Assume the specific

heat capacity of the solution is 4.18JoC-1g-1

and that no heat is transferred to the surroundings or to the calorimeter. What is the heat of solution (the heat created by the dissolving of the salt) of potassium

bromide in kJ/mol?