At the end of the experiment, it was discovered that the thermometer had not been calibrated. When it was calibrated, it was found that the thermometer read 0.50 C low. What effect would thus thermometer reading have on the reported change in H neoutzn calculated above?
At the end of the experiment, it was discovered that the thermometer had not been calibrated. When it was calibrated, it was found that the thermometer read 0.50 C low. What effect would thus thermometer reading have on the reported change in H neoutzn calculated above?
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter15: Acid-base Equilibria
Section: Chapter Questions
Problem 128CP: Consider the titration curve in Exercise 115 for the titration of Na2Cr3 with HCl. a. If a mixture...
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At the end of the experiment, it was discovered that the thermometer had not been calibrated. When it was calibrated, it was found that the thermometer read 0.50 C low. What effect would thus thermometer reading have on the reported change in H neoutzn calculated above?
Transcribed Image Text:© 1988 Cengage Learning
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2. When a neutralization reaction was carried out using 100.0 mL of 0.7890M NH3 water and 100.0 mL of
0.7940M acetic acid, AT was found to be 4.76 °C. The specific heat of the reaction mixture was 4.104 J
gK and its density was 1.03 g mL-1. The calorimeter constant was 3.36 J K-1.
(1) Calculate AHneutzn for the reaction of NH3 and acetic acid.
heat absorbed. by reaction= (volume)( density) (AT) (specific hcat)
= (200 mL)(1.03)(4.76) (4.104)
= 4,0 24. 22
heat absor bed by calorimeter =kalorimet er constant)(AT)
= 3.36 (4.76) =15. 99
total heat = (heat absorbed by mixture) (heat absor bed bu cealorimeter) W (S)
= 4. 04 E 3J 4,04 WJ
1o bisoter
limiting Moks of NHs=0.789..130.0789 mol
agent
AH
ntu ten
6L/2 KJ /mol
.0774
Moles of CHg COOH=.794-. =,0794 m
answer
(2) At the end of the experiment, it was discovered that the thermometer had not been calibrated.
When it was calibrated, it was found that the thermometer read 0.50 °C low. What effect would
this thermometer reading have on the reported AHneutzn calculated in (2) above?
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