Thermochemistry Post-Lab Previous Question Score/Possible Points: 3/3 Total Scor

Question

Thermochemistry Post-Lab Previous Question Score/Possible Points: 3/3 Total Score So Far Total Exercise Points: 18/ 109 Scoring Scheme: 3-3-2-1 Part 1 Calculate a 90% confidence limit for this data 90% confidence limit- Submit AnswenContinue Quit Post-Lab 14) Scoring Scheme 3-3-2-1 Partl. For each trial, calculate the heat capacity of your calorimeter. Report your answer in the correct number of signiticant figures. This may only be 2 or 3 significant figures Your Answer: 127 Your Answer: 128 Your Answer: 142 You Scored 3 points out of 3 Possible No Points Possible No Points Possible 15) Scoring Scheme 3-3-2-1 PartI. Calculate the average heat capacity for the calorimeter. Report your answer to the correct number of significant figures. Average- 16) Scoring Scheme: 3-3-2-1 PartI. Calculate a standard deviation for your data of the heat capacity Standard deviation Your Answer: 8.4 Scored 3 points out of 3 Possible

Explanation / Answer

Q)

Z-value for 90% confidence interval = 1.645

Zvalue = (X-Mean)/(standard deviation)

1.645 = (X-132)/8.4

X = 132 + 8.4 * 1.645 = 13.818 + 132 = 145.818

Hence the range of 90% confidence interval will be [132-13.818,132+13.818]

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