Experiment 6 FINAL Report Sheet.pdf - CHEM 111 u2013 Fall...

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CHEM 111 – Fall 2020 Experiment 6: Calorimetry Read through the experimental procedure in Chemtrek and watch the associated experiment videos in Canvas. In the provided space, write a lab goal, summarize the procedure, record your observations, and complete all questions included in this report sheet. Section A: Construction of a Calorimeter Section B: Combustion of a Candle 1 Complete before lab Goal: use a calorimeter and basic knowledge of chemistry to calculate the loss of energy of multiple objects. Procedure: Thompson, S. PSU Chemtrek: Expt. 6 Calorimetry; Keiser, J., Hayden-McNeil Publishing. Plymouth, MI, 2020 pp 6-1 to 6-14. Complete before lab. Watch the demonstration video and draw a diagram of the calorimeter used in this experiment and label the parts. Temperature probe Cardboard Aluminum can Metal triangle Stand Cheese ball Rubber stopper support stand 21.3c
Question 1: Find the energy released per gram of paraffin. Put your answer in terms of Food Calories/g. Complete before lab. Watch the demonstration video to collect data and observe the experiment. In the space below, summarize how the experiment(s) were completed and record all observations and data. First she filled the aluminum can with 200 ml water. then find the initial mass of the candle that is going to be burned and put it in a petri dish to collect the melted wax. it weighs 92.9254 grams. Place your candle under your can and lower the can to just above the candle. Place the temperature probe in the water and record the temperature. The temperature was 20.9 degrees celsius. The candle was lit and the final temperature of the water was 31.1 degrees celsius. Then re mass your candle. The mass of the candle is now 92.2399 grams.The loss is .6855 grams. T
2 Question 2: The accepted energy content value for paraffin is 1.00 x 10 4 cal/g. Convert this value to Food Calories per gram. 1,000 food cal= 1 scientific cal 1.00x10^4 cal/g x 1/1000 cal = 10 food calories per gram
CHEM 111 – Fall 2020 Question 3: How does the value you found compare with the accepted value of the energy content of paraffin? Calculate your percent error.
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