150 mL of a 0.776 M HCl aqueous solution is mixed with 150 mL of 0.388 M Ba(OH)2 aqueous solution in a coffee-cup calorimeter. Both the solutions have an initial temperature of 33.8°C. Calculate the final temperature of the resulting solution, given the following information:
H+(aq) + OH- (aq) → H2O(l) ΔHrxn = -56.2 kJ/mol
Assume that volumes can be added, that the density of the solution is the same as that of water (1.00 g/mL), and the specific heat of the solution is the same as that for pure water, 4.184 J/(gK).