The Heat of Solution of Ammonium Chloride Is 15

The heat of solution of ammonium chloride is 15.2 kJ/mol. If a 6.134 g sample of NH₄Cl is added to 65.0 mL of water in a calorimeter at 24.5°C, what is the minimum temperature reached by the solution? (The specific heat of water = 4.18 J/g·°C; the heat capacity of the calorimeter = 365.J/°C.)

A) 27.1°C
B) 18.6°C
C) 19.7°C
D) 21.9°C
E) 30.4°C