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 of negligible heat capacity. The initial temperature of the HCl and Ba(OH)2 solutions is the same at 20.48°C. For the process
the heat of neutralization is -56.2 kJ/mol. What is the final temperature of the mixed solution? Assume the specific heat of the solution is the same as that for pure water.
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