A student performed a calorimetry experiment to determine the specific heat ofaluminum metal. She did three trials and obtained values of 0.765 J/goC, 0.777 J/goC, and 0.815 J/goC. a.What was the average specific heat value she obtained? Show your work. b.What was the standard deviation of her experiments? Show your work. c.If the theoretical value is 0.900 J/g oC calculate the percent error using your average value found in part a as the experimental value. Show your work. d.What do your answers to parts b and c tell you about the precision and accuracy of this experiment? Explain your answer.
A student performed a calorimetry experiment to determine the specific heat ofaluminum metal. She did three trials and obtained values of 0.765 J/goC, 0.777 J/goC, and 0.815 J/goC. a.What was the average specific heat value she obtained? Show your work. b.What was the standard deviation of her experiments? Show your work. c.If the theoretical value is 0.900 J/g oC calculate the percent error using your average value found in part a as the experimental value. Show your work. d.What do your answers to parts b and c tell you about the precision and accuracy of this experiment? Explain your answer.
Chemistry by OpenStax (2015-05-04)
1st Edition
ISBN:9781938168390
Author:Klaus Theopold, Richard H Langley, Paul Flowers, William R. Robinson, Mark Blaser
Publisher:Klaus Theopold, Richard H Langley, Paul Flowers, William R. Robinson, Mark Blaser
Chapter5: Thermochemistry
Section: Chapter Questions
Problem 20E: A 45-g aluminum spoon (specific heat 0.88 J/g C) at 24 C is placed in 180 mL (180 g) of coffee at 85...
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A student performed a calorimetry experiment to determine the specific heat ofaluminum metal. She did three trials and obtained values of 0.765
J/goC, 0.777 J/goC, and 0.815 J/goC.
a.What was the average specific heat value she obtained? Show your work.
b.What was the standard deviation of her experiments? Show your work.
c.If the theoretical value is 0.900 J/g oC calculate the percent error using your average value found in part a as the experimental value. Show your work.
d.What do your answers to parts b and c tell you about the precision and
accuracy of this experiment? Explain your answer.
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