Two solutions, initially at 24.69°C, are mixed in a coffee cup calorimeter (C cal = 105.5 J/°C). When a 200.0 mL volume of 0.100 M AgNO 3 solution is mixed with a 100.0 mL sample of 0.100 M NaCl solution, the temperature in the calorimeter rises to 25.16°C. Determine the DH° rxn, in units of kJ/mol AgCl. Assume that the density and heat capacity of the solutions is the same as that of water.