A Calorimeter Contains 142 G of Water at 22

A calorimeter contains 142 g of water at 22.5°C. A 12 g sample of NaCl is added to the water in the calorimeter. After the solid has dissolved, the temperature of the water is 21.4°C. Calculate the enthalpy of solution for dissolving sodium chloride. Assume that no heat is lost to the calorimeter or the surroundings and that the specific heat of the solution is the same as that of pure water.

A) 0.059 kJ/mol
B) 0.71 kJ/mol
C) 0.83 kJ/mol
D) 3.2 kJ/mol
E) 3.5 kJ/mol