Question

HCl and NaOH react according to the following equation: HCl (aq) + NaOH → Na+(aq) +...

HCl and NaOH react according to the following equation:

HCl (aq) + NaOH → Na+(aq) + Cl-(aq) + H2O(l)

In a coffee cup calorimeter, 50mL of 2.00 M HCl was combined with 50mL of 2.05 M NaOH. The temperature of the solution rises from 22 degree C to 36 degrees C. What is the enthalpy change for the reaction (delta H rxn)? What is the molar enthalpy for the reaction?

Given:

  • The heat capacity of the calorimeter (Cc) is 14.0 J/degree C

  • The heat capacity of NaCl solution (Cs) is 3.91 J/g degrees C

  • Density of a 1M NaCl solution = 1.037 g/mL

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