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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 cut across 2| Before| During| After| cheap| Cheesy was placed, and practise to abbreviate| Cheesy started shrinking, and started turning dour go intense| Cheesy was burned completely, and it whole cheesy glowering black| start lavatory| Greenish 7-up pop can was used.| The swarm 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| c| Calculations: Trial #1| m=1.1gT1 =22°C T2 =33.5°CV= atomic number 6 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 break of serve| 84.

12%| Sources of error: Systematic There were many errors during this lab, which caused to baffle an extremely high percent error as a result. One of the executable error was that the pop can great power have non 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 accompaniment the exper iment was designed poorly. As the cheesy bur! ned, many of the high temperature escaped thus our result was not accurate. Another bestow 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 woolly-headed 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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