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6. You place 50.0 mL of 0.500 M NaOH in a coffee cup calorimeter at 25.00 oC and add 25.0 mL of 0.500 M HCl, also at 25 oC. After stirring, the final temperature is 27.21 oC. [Assume that the total volume is the sum of the individual volumes and that the final solution has the same density as water.] Calculate the heat released and the enthalpy of reaction in terms of mols of H2O.