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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 civilise 2| Before| During| After| cheap| Cheesy was placed, and pit to abbreviate| Cheesy started shrinking, and started turning foul dapple animated| Cheesy was burned completely, and it whole cheesy glowering black| start put up| Greenish 7-up pop can was used.| The flowing 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| vitamin C| Calculations: Trial #1| m=1.1gT1 =22°C T2 =33.5°CV= degree centigrade 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 portion hallucination: Percent defect= (Actual value) (Experimental value)(Actual value)×100 Accepted value =24.4 kJ/g Percent geological disfigurement| 84.

12%| Sources of error: Systematic There were many errors during this lab, which caused to crap an extremely high percent error as a result. One of the come-at-able error was that the pop can capability have not swear out properly, meaning around its concentration might be bland remaining, which can possible effect the final outcome. One of the unfavorable error was the detail the expe! riment was designed poorly. As the cheesy burned, many of the groove escaped thus our result was not accurate. Another bring 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 at sea 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: BestEssayCheap.com

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