chem lab exp. 4 (ii)

chem lab exp. 4 (ii) - L aboratory 4 Heat of Neutralization...

Info iconThis preview shows pages 1–5. Sign up to view the full content.

View Full Document Right Arrow Icon
Laboratory 4 Heat of Neutralization Name: Norkhairin Yusuf Section: 50, Monday 2 PM Performed: 5 January 2008 Submitted: 12 January 2008 Lab Instructor: Paul Madden Your Signature: .
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Purpose: Every chemical change is accompanied by a change in energy therefore we want to measure, using a calorimeter, the energy changes accompanying neutralization reactions. Procedure: Lab procedure is referred to the lab manual on experiment #4 Heat of Neutralization Data Tables: A. Heat Capacity of Calorimeter Table 1: Temperature vs. Time Data for Calorimeter Calibration Trial 1 ( o C) Trial 2 ( o C) Trial 3 ( o C) Calorimeter & Cool Water,T 1 24.0 23.1 23.7 Calorimeter & Warm Water, T 2 43.0 41.0 41.1 Time (s) : 0 27.0 26.0 25.0 15 32.0 31.0 31.0 30 33.0 31.5 32.0 45 33.0 31.9 32.1 60 33.0 31.9 32.2 75 33.1 31.9 32.2 90 33.1 31.9 32.2 105 33.1 31.8 32.2
Background image of page 2
120 33.2 31.8 32.2 135 33.2 31.8 32.2 150 33.2 31.8 32.1 165 33.2 31.8 32.1 180 33.2 31.8 32.1 Table 2: Heat Capacity of Calorimeter Trial 1 Trial 2 Trial 3 Final Temperature, T f 33.2 31.8 32.1 Heat lost by warm water (J) 2048.2 1922.8 1881.0 Heat gained by cool water (J) 1922.8 1818.3 1755.6 Heat absorbed by calorimeter (J) 125.4 104.5 125.4 Calorimeter heat capacity, C cal in J/ o C 13.63 12.01 14.93 Average value of C cal 13.52 Standard Deviation of C cal 2.14 Λ of C cal at 95% confidence ±3.43
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
B. Heat Neutralization for HCl(aq) + NaOH(aq) H 2 O(l) + NaCl(aq) Table 3: Temperature vs. Time Data for HCl – NaOH Neutralization Trial 1 ( o C) Trial 2 ( o C) Trial 3 ( o C) Initial Temperature of NaOH(aq), T 1 24.0 23.0 23.2 Initial Temperature of HCl(aq) 24.0 23.0 23.2 Time (s) : 0 25.0 24.8 25.0 15 29.8 29.8 30.0 30 31.0 30.0 30.4 45 31.0 30.4 30.9 60 31.1 30.6 30.9 75 31.2 30.6 30.9 90 31.2 30.6 30.9 105 31.1 30.6 30.9 120
Background image of page 4
Image of page 5
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 03/18/2010 for the course COS 101121501 taught by Professor Langner during the Fall '08 term at RIT.

Page1 / 13

chem lab exp. 4 (ii) - L aboratory 4 Heat of Neutralization...

This preview shows document pages 1 - 5. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online