50.0 mL of 0.100 M KOH, at 20.00o C, is added to 50.00 mL of 0.110 M HCl, at 20.00o C, in a coffee cup calorimeter. The enthalpy of neutralization is 56.0 kJ/mol. The specific heat capacity of the total solution is 4.184 Jg-1 oC-1, and the density of the total solution is 1.00 g/mL, what is Tf for the reaction?
Number of moles of KOH
Number of moles of HCl
0.005 moles of KOH will neutralise 0.005 moles of HCl. But 0.0055 moles of HCl are present. Hence, HCl is in excess and KOH is limiting reagent.
The enthalpy of neutralisation is 56.0 kJ/mol.
Heat associated with neutralisation of 0.005 moles of KOH is
Convert the unit from kJ to J
Total volume of solution
The density of solution is 1.00 g/mL.
Mass of solution
The specific heat of solution is 4.184 J/g/oC
Initial temperature is 20.00 deg C.
Note: Since during neutralisation of a base with an acid, heat is released, the final temperature is higher than initial temperature. Hence, to obtain final temperature, the temperature change is added to initial temperature.
Get Answers For Free
Most questions answered within 1 hours.