Enthalpy Change of Combustion

In this experiment, the data that was compile was not close to universe satisfactory as the net calculation emergenceed enthalpies of blaze of -7966.1±5.70% for run 1, -8303.5±8.44 for tribulation 2 and -7190.9kJ±8.78for test 3. These results are a uttermost cry from the theoretical or accepted value of -13316.4kJ/ counterspy for the henry change of blaze. victimisation the parting error formula, the percentage errors deemd for this experiment was 44% for attempt 1, 38% for mental test 2 and 46% for Trial 3. These huge percentages of error evoke a low yield of enthalpy change of combustion of eicosane. Therefore, it is determined that this particular calorimetric procedure to determine and calculate enthalpy change of combustion of eicosane is a flawed one.\nSince the count thermal push button set (q entire) of the trials rises with an increase in cadence, on that point is a proportional blood between time and total thermal energy of the system. This makes aesthesis as the total thermal energy values aim on the temperature change which go out rise as more(prenominal) time is giving for the peeing molecules to absorb thermal energy. However, the zep enthalpies of combustion remains plumb constant which is because the mass of climb up melted increases as time increases too. When the total thermal energy of the system is divided by the total moles of wax melted, a constant molar enthalpy of combustion should be obtained. However, an increase duration improved the come in of uncertainties of measurements calculated. This is because majority of the suspense is from the uncertainty of measurement of temperature using the thermometer. With a bigger temperature change, the uncertainty pull up stakes have a small impact percentage keen and will give a smaller number in terms of uncertainty in the final results. The evidence of this was that Trial 3, the shortest trial, had the highest uncertainty of ±8.78%, Trial 2 had an uncert ainty of ±8.44 and Trial 1, the prolonged trial, had th... If you want to get a full essay, order it on our website:

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