Thermochemistry: Calorimetry Pre Lab

Given the following protocol

For each Part AB and C

- What tables/calculations should I write on the lab notebook , please give examples and show detailed calculations/tables (Please show them in table format)

- This is for Prelab preparation on which the values during the lab will be directly written on these tables

- What formulas are used for each part of the lab?

In this experiment, the enthalpy of neutralization of a strong acid and the enthalpy of solution of a salts in water will be determined using a "coffee cup" calorimeter. Part A: Heat Capacity of the Calorimeter 1) With a graduated cylinder, measure out 50mL of distilled water at or below room temperature. Transfer it to the clean dry calorimeter, which is fitted with a special thermometer calibrated to 0.1C. Stir carefully with the thermometer and allow to stand until the temperature reading remains constant. 2) Take 50mL of distilled water from the high temperature water bath (>40C). Measure the exact temperature and immediately transfer it to the calorimeter, as quickly and completely as possible. Begin measuring the time when all of the water has been added, and note the time and temperature at 15sec intervals from then on for 4 minutes. Stir constantly both during and after the addition of the hot water. " "Calculations"* - Plot a temperature versus time graph and determine the temperature at the instant of mixing by extrapolation. What does the plot tell you about the effectiveness of the Styrofoam cup as an insulator? - Calculate the heat capacity of the calorimeter, assuming that the specific heat capacity of water is 4.18Jg1K1 and that the density of the water is 1.00gmL1. Part B: Enthalpy of Neutralization of a Strong Acid 1) In a clean dry graduated cylinder, measure out exactly 50mL of the NaOH solution and transfer completely to the clean dry calorimeter. Record this temperature and the concentration of the NaOH solution. 2) Meanwhile, rinse out the graduated cylinder with tap water, distilled water and a few mL of the HCl solution. Measure out 50mL of the HCl solution. Allow it to stand until its temperature is constant and equal to room temperature. Record this temperature and the 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. Note the time and temperature after the addition of the last drop, and at 15sec intervals from then on for 4 minutes. Stir the contents of the calorimeter constantly. 4) Test the contents of the calorimeter with litmus paper. The solution should be slightly acidic (pH