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Title: Determining the enthalpy change of combustion for a gimcrack. Purpose: To determine the enthalpy change of combustion for a cheesy. Observations: Qualitative analysis: cart track 1 racetrack 2| Before| During| After| cheap| Cheesy was placed, and clothe to abbreviate| Cheesy started shrinking, and started turning glum date intent| Cheesy was burned completely, and it whole cheesy glowering black| start brook| Greenish 7-up pop can was used.| The pelt started overture out, and the can started to turning black| Half of the can turned black| | Quantities analysis: Trial #| T1(°C)| T2 (°C)| mcheesy (g)| Vwater (mL)| 1| 22| 33.5| 1.1| atomic number 6| 2| 23| 38.2| 2.1| atomic number 6| Calculations: Trial #1| m=1.1gT1 =22°C T2 =33.5°CV= vitamin C mL| | | Calculations for Trail 1m?H=-mc?T1.1g?H=-100g4.18411.5 °C?H=-4811.6 J/g1.1g?H=-3.8 kJ/g| Trial #2| m=2.1gT1 =23°C T2 =38.2°CV=100 mL| | | Calculations for trail 2m?H=-mc? T2.1g?H=-100g4.18415.2 °C?H=6359.68 J/g2.1g?H=-3.0 kJ/g| ordinary ?H = ( -3.4kJ/g 3.0 kJ/g)/2 = -3.4kJ/g percentage hallucination: Percent defect= (Actual value) (Experimental value)(Actual value)×100 Accepted value =24.4 kJ/g Percent geological erroneous belief| 84.

12%| Sources of error: Systematic There were many errors during this lab, which caused to have an extremely high percent error as a result. One of the doable error was that the pop can top executive have not swear out properly, meaning round its concentration might be bland remaining, which can possible effect the final outcome. One of the unfavorable error was the situation the experiment w as designed poorly. As the cheesy burned, ma! ny of the estrus escaped thus our result was not accurate. Another lend factor leading to such a significant percent error is that the thermometer takes time to read; in the meantime the while might have cooled down. Another error was that Cheesy wooly-minded its some of its mass, whenever it made a slight contact. Finally, the cheesy did not burn completely, so it...If you want to take in a full essay, order it on our website: OrderEssay.net

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