Question

When 50.0 mL of 1.20M of HCl(aq) is combined with 50.0 mL of 1.30M of NaOH(aq) in a coffee-cup calorimeter, the temperature of the solution increases by 8.01ºC. What is the change in enthalpy for this balanced reaction?
HCl(aq)+NaOH(aq)→NaCl(aq)+H2O(l)
Assume that the solution density is 1.00 g/mL and the specific heat capacity of the solution is 4.18 J/g·ºC.
A) -55.8 kJ
B) 55.8 kJ
C) 51.5 kJ
D) -51.5 kJ
E) -26.8 kJ

Answer

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