Cheetos Combustion Assignment
Data Collection
Mass of the Cheetos, Calorimeter and Measure of the Temperature and Volume of Water
Trial Number Before Mass of Cheetos [g] ñ 0.01g After Mass of Cheetos [g] ñ 0.01g Mass of Calorimeter [g] ñ 0.01g Volume of Water [mL] ñ 0.01mL Temperature of Water Before Heating [ðC] ñ 0.1ðC Temperature of Water After Heating [ðC] ñ 0.1ðC
1 4.74 0.12 27.90 50.00 25.0 91.0
Qualitative Observations
Cheetos are changing from orange to black in color as they are burned.
The flames are coming out of the oxygen holes.
Smoke is coming out of the oxygen holes.
Data Processing and Presentation
Change in Temperature
Tchange = Tafter - Tbefore
Tchange = 91.0ðC - 25.0ðC
Tchange = 66.0ðC
Change in Mass
mchange = mafter - mbefore
mchange = 4.74g - 0.12g
mchange = 4.62g
Amount of Heat Gained By Water
-let c be the specific heat capacity of water
Heat = mwater * cwater * âÂÂT
Heat = 50.00g
* 4.184j/gCð * 66.0ðC
Heat = 13 807.20J
Amount of Heat Gained By Calorimeter
-let c be the specific heat capacity for aluminum
Heat = mcalorimeter * ccalorimeter * âÂÂT
Heat = 27.90g * 0.897j/gCð * 66ðC
Heat = 1 651.7358J
Total Heat Gained
Htotal = Hcalorimeter + Hwater
Htotal = 13 807.20J + 1 651.7358J
Htotal = 15 458.94J
Conversion From Joules to Kilojoules
16 458.94J = x kJ
16437.73J = 15.5kJ
Amount of Heat Gained from 50g of Cheetos
-let x be the amount of heat gained from 50g of Cheetos
16.5kJ/4.62g = x kJ/50g
x = 167.7kJ
Conclusion
Conversion From Kilocalories to Kilojoules
290kilocalories * 4.184kilojoule/kilocalorie = 1.21*103kilojoules
Percentage Error
Perror = [|[actual value - theoretical value]| / theoretical value] * 100%
Perror = [|[167.7kJ - 1.21*103...