suppose that you repeated PART B of the experiment using1M HNO3(aq). How would you expect the â–³Hneut to compare with thatfor the neutralization of HCL? explain.

â–³H = Hfinal - Hinitial = qp= â–³E + Pâ–³V

PART B - Enthalpy of Neutralization of a Stong Acid

The heat of neutralization of a strong acid, hydrochloric acid,will be determined. The strong base is sodium hydroxide of aconcentration slightly less than that of the acid.

Procedure

1.In a clean dry graduated cylinder, measure out exactly 50 mLof the NaOH solution and transfer completely to the clean drycalorimeter. Record this temperature and the concentration of theNaOH solution.

2.Meanwhile, rinse out the graduated cylinder with tap water,distilled water and a few mL of the HCl solution. Measure out 50 mLof the HCl solution. Allow it to stand until its temperature isconstant and equal to room temperature. Record this temperature andthe concentration of the acid solution.

3.Add the acid as quickly as possible to the calorimeter,counting the time from the addition of the first drop of acid. Notethe time and temperature after the addition of the last drop, andat 15 sec intervals from then on for 4 minutes. Stir the contentsof the calorimeter constantly.

4.Test the contents of the calorimeter with litmus paper. Thesolution should be slightly acidic(pH<7.0), indicating that theknown amount of base was completely consumed in theneutralization