Burning A Peanut Data Sheet Mass Of Aluminum Can G 1360

Burning A Peanut Data Sheetmass Of Aluminum Can G 1360

Burning a Peanut Data Sheet Mass of Aluminum can (g) ________13.60____________ Mass of Al can plus 50 mL water (g)______62.55_______ Mass of 50 mL of water added (g) _______48.95_______ Mass of cork plus needle (g)_________6.33___________ Mass of cork plus needle plus peanut (g)______7.41____ Mass of peanut before the burn (g) _______1.08_______ Mass of cork/needle/burned peanut (g)_____6.45______ Mass of peanut after the burn (g) _________0.12_______ Change in mass of peanut (before burn – after burn) (g) ___0.96__ Starting temperature of water (to 0.1 C) _____25.2_____ Final temperature of water (to 0.1 C) _________82.4____ Δtfinal Change in temperature of water (to 0.1 C) _____57.2__ Calculations ΔE = swater X mwater X Δtfinal + sAluminum x mAluminum x Δtfinal ΔE = (4.184J/g C) X mwater X Δtfinal + (0.900J/g C) x mAluminum x Δtfinal ΔE from the above result is divided by the change in the mass of the peanut. The units are J/g. Compare your result with the results on a jar of peanuts, which are: (166 Cal./28.35 g)(1000 cal. /1 Cal.)(4.184 J/1 cal.) = 24,500 J/g. Your results are expected to be lower due to heat losses. For example, if you got 12,500 J/g, it is (12,500/24,500)*100%= 51.0% of the jar value. It may be low because some heat flowed around the can and the soot meant it was not burned completely as it would be in pure Oxygen. A bomb calorimeter is sealed and uses pure Oxygen. Laboratory Write-up In addition to the Lab Report Format found in the course syllabus, include the following items: Headings for each section, Title, Purpose, Procedure, etc. Amounts of reactants and products from the Data Sheet Units properly labeled Typed observations in the Procedure section % Yield: your results in J/g divided by the jar value in J/g times 100% Explanation of % yield Degrees C should be read to 0.1 C Weight of peanut after burn should be included Calculations done properly Reports are turned in for each individual even though you worked as partners. Identical reports from different people are not accepted. Identical report students will get a zero. Lab Report Format (Make sure you write the words “Title”, “Purpose”, etc. in your lab report) 1. Title 1. Purpose Include a brief summary (a paragraph or less) of the purpose of the experiment. 1. Procedure Include a reference to the procedure you have been given as well as a brief summary of what you did. The summary need only consist of the general methods used, and should not include specific details from the experimental procedure. Any changes or deviations from the procedure should be noted here. 1. Results This section is where you will report your analyzed data and results. It may consist of graphs or tables as well as a summary (in words) of what you have found. 1. Conclusions Explain what conclusions you can draw from your results. This is the part of the report where you tell the reader what your results mean. Any unexpected results should be discussed as well as possible reasons for why you did not get what you expected.