Answered: 1. a. Estimate the % uncertainty in…

Chemistry: An Atoms First Approach

2nd Edition

ISBN:9781305079243

Author:Steven S. Zumdahl, Susan A. Zumdahl

Publisher:Steven S. Zumdahl, Susan A. Zumdahl

Chapter7: Chemical Energy

Section: Chapter Questions

Problem 61E: A coffee-cup calorimeter initially contains 125 g water at 24.2C. Potassium bromide (10.5 g), also...

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Please answer all questions and show calculations For the image attached For 1. a Mass of metal: Trial 1 is 35.0228 g Trial 2 is 35.0915 g Trial 3 is 34.0821 g Mass of water: Trial 1 is 20.0177 g Trial 2 is 20.0250 g Trial 3 is 20.0168 g For delta t of water: Trial 1 is 15.5 C Trial 2 is 15.7 C Trial 3 is 15.1 C For delta t of metal Trial 1 is 80.1 C Trial 2: 80.2 C Trial 3: 79.5 C For B my calculated Specific heat is: Trial 1 is 0.462 Trial 2 is 0.467 Trial 3 is 0.466

POSTLAB
1. a. Estimate the % uncertainty in your measurement of:
mass of water
mass of metal
AT of water
EXPERIMENT 9
b. For your calculated specific heat, determine:
(1) % uncertainty
Which % uncertainty is greatest? Which measurement is most critical?
AT of metal
(2) absolute uncertainty
(3) how many significant figures your reported value should have.

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