Please help me answer the questions from a to f using the data provided InitialFinalTemp Temp.Mass of Mass ofburner H₂OевьMass ofburnerMethanol 110.14g 26.6°C 47.8°C 108.09g| 99.8 mlEthanol108.73g /26.5°C 47.10°C℃/107.51g|/ 98-9 m²Propan-1-01 113.00g/24.9°C 46.2°C 42.38g 98.7.ndButan -1-01 106.54g/24.1°C 47.1°C 105.90g/99-2mLPentan-1-01 124.06g|26.8°C/48.2°C/123.55g|94.4 mLOctan-1-01 | 115.55g |27.1°C / 47.8°C/115.05g|99-1ask Combustion of AlcoholsWhen alcohols burn they produce heat. Do different alco-hols produce different quantities of heat-do their molarenthalpies of combustion differ? In this investigation, youwill link your study of thermochemistry to your knowledgeof the molecular structure of alcohols to investigate energyrelationships.PurposeThe purpose of this investigation is to use calorimetry todetermine the molar enthalpy change in the combustion ofeach of a series of alcohols.Prediction(a) Predict what should happen to the enthalpies of com-bustion per mole of alcohol as the alcohol moleculesbecome larger.INVESTIGATION 5.3.1 continuedFigure 2Apparatus for burning alcoholsAlcohols are highly flammable. Do not attempt torefuel the burners. If refuelling is necessary, askyour teacher to do so.Do not move the burners after they are lit.Procedure1. Obtain an alcohol burner containing one of the alco-hols.Questioncentigram or analytical balanceHow do the enthalpies of combustion change as the alcohol alcohol burners containing ethanol, propanol, and butanolmolecules become larger (i.e., ethanol to butanol)?2. Put on your eye protection.3. Place 100 ml. of cold water in a small can suspended overan alcohol burner surrounded by a larger can (Figure 2).4. Measure the mass of the alcohol burner and the tem-perature of the water.5. Burn the alcohol such that the heat from the reactionis transferred as efficiently as possible into the water.6. Cease heating when the temperature has risen about20°C.7. Re-weigh the alcohol burner and remaining alcohol.O QuestioningO HypothesizingPredictingmbalO PlanningMaterialslab aproneye protectionConductingRecording● AnalyzingEvaluatingCommunicatingExperimental DesignYou will burn measured masses of a series of alcohols, andcalculate the amount of each alcohol burned. Assume thatthe energy produced is transferred to a measured volume ofwater, the temperature change of which is calculated. Theenthalpy change involved in the combustion of one mole ofeach alcohol can then be calculated and compared.thermometersmall tin can, open at one end, and cut under the rim onopposite sidesstirring rodring stand with iron ringlarge tin can, open at both ends, with vent openings cutaround the rim at the base100-ml. graduated cylinderAnalysis(b) Assume that 100 mL of water has a mass of 100 g. Foreach of the alcohols, calculate and tabulate:(i) the heat absorbed by the water in the calorimeter,which equals the heat produced by alcoholburning(ii) the heat produced per gram of alcohol;(iii) the amount (in moles) of alcohol burned;(iv) the heat produced per mole of alcohol.(c) Write a thermochemical equation to represent theburning of 1 mol of each of the alcohols, includingyour experimental value for AH comb(d) Use the four methods described in Section 3.3 to rep-resent the experimentally determined enthalpychange for the burning of 2 mol of ethanol.(e) Use your representations to answer the question.Evaluation(f) What are the sources of experimental error in thisexperiment?(g) Accepted values for combustion of the three alcoholsare: 1369 kJ/mol, 2008 kJ/mol, and 3318 kJ/mol.Calculate a percentage difference between your exper-imental value and the accepted values. Based on thiscalculation, was the Experimental Design an accept-able method to answer the Question?Synthesis(h) If you were in the business of buying, transporting.and storing alcohols for use as home-heating fuels,which of these alcohols would you choose to workwith? Explain.

To calculate the combustion enthalpy first the full reaction is to be written C2H5 -OH + 3O2 = 2CO2…

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10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...