A coffee cup calorimeter initially contains 125 g of water, at a temperature of \[24.2{}^\circ C\]. 8 g of ammonium nitrate \[(N{{H}_{4}}N{{O}_{3}}),\] also at \[24.2{}^\circ C,\] is added to the water, and the final temperature is \[18.2{}^\circ C\] what is the heat of solution of ammonium nitrate in kJ/mol? The specific heat capacity of the solution is \[4.2\text{ }J/{}^\circ Cg\].

• A. 33.51 kJ/mol
• B. 39.5 kJ/mol
• C. 32.2 kJ/mol
• D. 37.3 kJ/mol