Chem 2b lab 1

chem 2b lab 1
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Post-Lab Data Summary Note : some questions will display a variable like "nCount" or "SyInput" instead of an actual number in the data summary. Q# Question Text 5) Scoring Scheme: 3-2-1-1 Part I. In step 8 of Part I, why do you not want any of the water on the outside of the test tube to drip off into the calorimeter? Your Answer: c. Both a and b. You Scored 2 points out of 3 Possible 6) Data Entry - No Scoring Part I. For each trial, enter the precise mass in GRAMS of the "hot" water in the test tube. Your mass precision should be reported to a thousandth of a gram, i.e. 30.034 g. (Use 5 significant figures.) Your Answer: 26.36 No Points Possible Your Answer: 30 No Points Possible Your Answer: 30 No Points Possible 7) Data Entry - No Scoring Part I. For each trial, enter the initial temperature of the "hot" water in the test tube, Tihot water. Your temperature precision should be reported to two-tenths of a degree Celsius, i.e. 99.6oC. Your Answer: 100.3 No Points Possible Your Answer: 100.2 No Points Possible Your Answer: 97 No Points Possible 8) Data Entry - No Scoring Part I. For each trial, enter the final temperature of the mixture in the calorimeter, Tf. This should be the highest temperature reached after mixing. Your temperature precision should be reported to two-tenths of a degree Celsius, i.e. 34.0oC. Your Answer: 40.1 No Points Possible Your Answer: 43 No Points Possible Your Answer: 42 No Points Possible 9) Scoring Scheme: 3-3-2-1 Part I. For each trial, enter the amount of heat lost by the hot water, qhot water. Hints: The specific heat of water is 4.184 J/goC. Be careful with your algebraic sign and remember that the change in temperature is equal to the final temperature minus the initial temperature. Report your answer using 4 digits. Your Answer: -6640 You Scored 3 points out of 3 Possible Your Answer: -7180 No Points Possible Your Answer: -6904 No Points Possible 10) Data Entry - No Scoring
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Part I. For each trial, enter the precise mass in GRAMS of the "cool" water in the calorimeter. Your mass precision should be reported to a thousandth of a gram, i.e. 70.546 g. (Use 5 significant figures.) Your Answer: 70.1 No Points Possible Your Answer: 70.1 No Points Possible Your Answer: 70.05 No Points Possible 11) Data Entry - No Scoring Part I. For each trial, enter the initial temperature of the "cool" water in the calorimeter, Ticalorimeter. Your temperature precision should be reported to two-tenths of a degree Celsius, i.e. 17.2oC. Your Answer: 23 No Points Possible Your Answer: 23 No Points Possible Your Answer: 23 No Points Possible 12) Scoring Scheme: 3-3-2-1 Part I. For each trial, enter the amount of heat gained by the cool water, qcool water. The specific heat of water is 4.184 J/goC. Report your answer to 4 digits. Note: You should always carry 1 or 2 extra digits beyond the number of significant
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