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Calorimetry and Chemical Reactions

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What will be the final temperature of the solution in a coffee cup calorimeter if a 50.00 mL sample of 0.250 M HCl(aq) is added to a 50.00 mL sample of 0.250 M NaOH(aq). The initial temperature is 19.50 °C and the Hrxn is −57.2 kJ/mol NaOH. (assume the density of the solution is 1.00 g/mL and the specific heat of the solution is 4.18 J/g∙°C)

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