A quantity of 2.00 × 102 mL of 0.862 M HCl is mixed with 2.00×102 mL of 0.431 M Ba(OH)2 in a constant-pressure calorimeter that has a heat capacity (empty) of 453 J/°C. The initial temperature of the HCl and Ba(OH)2 solutions is the same at 20.48°C. For the process H+(aq) + OH–(aq) H2O(l), the heat of neutralization is –56.2 kJ/mol. What is the final temperature of the mixed solution?
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