Enthalpy Change of Combustion

In this experiment, the data that was collected was not close to being fitted as the final examination enumeration yielded enthalpies of flame of -7966.1±5.70% for ladder 1, -8303.5±8.44 for effort 2 and -7190.9kJ±8.78for Trial 3. These results ar a far emit from the theoretical or veritable value of -13316.4kJ/mole for the hydrogen change of combustion. Using the section error formula, the percentage errors measured for this experiment was 44% for Trial 1, 38% for Trial 2 and 46% for Trial 3. These large percentages of error indicate a low yield of heat content change of combustion of eicosane. Therefore, it is indomitable that this particular calorimetric use to determine and calculate henry change of combustion of eicosane is a flawed one.\nSince the positive caloric dexterity values (q count) of the trials turn offs with an step-up in clip, there is a proportional relationship among time and total thermal energy of the frame. This makes sense as the total thermal energy values depend on the temperature change which pull up stakes rise as more time is giving for the water molecules to rent thermal energy. However, the molar enthalpies of combustion remains fairly unvarying which is because the mass of wax melt down increases as time increases too. When the total thermal energy of the system is divided by the total moles of wax melted, a unbroken molar enthalpy of combustion should be obtained. However, an increased season improved the range of uncertainties of quantitys calculated. This is because volume of the suspense is from the hesitation of measurement of temperature using the thermometer. With a big temperature change, the uncertainty will possess a small come to percentage wise and will give a smaller number in basis 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 uncertainty of ±8.44 and Trial 1, the lo ngest trial, had th... If you hope to get a full(a) essay, order it on our website:

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