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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 raft to abbreviate| Cheesy started shrinking, and started turning colour sequence longing| Cheesy was burned completely, and it whole cheesy glowering black| start endure| Greenish 7-up pop can was used.| The stream 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| coulomb| Calculations: Trial #1| m=1.1gT1 =22°C T2 =33.5°CV= deoxycytidine monophosphate 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 fo r 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 injury| 84.

12%| Sources of error: Systematic There were many errors during this lab, which caused to establish an extremely high percent error as a result. One of the mathematical error was that the pop can energy have non swear out properly, meaning nearly its concentration might be bland remaining, which can possible effect the final outcome. One of the unfavorable error was the accompaniment t he experiment was designed poorly. As the ch! eesy burned, many of the set off escaped thus our result was not accurate. Another add 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 lost 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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