A 100.0 mL sample of 0.200M aqueous hydrochloric acid is added to 100mL of 0.200M aqueous ammonia in a coffee cup calorimeter. The following reaction occurs when the two solutions are mixed: HCL (aq) + NH3 (aq) ----> NH4Cl (aq). The temperature increase is 2.34 degrees C. Calculate change Hrnx (in KJ)