Calculate the enthalpy of combustion for ethanolusing bond energies and compare it with the othervalues. Investigation 5.5.1Calorimetry versus Enthalpies ofFormationRingerIn this activity, you will use enthalpies of formation todetermine the enthalpy change of a chemical reaction.Then, you will use the enthalpy values obtained fromcalorimetry experiments to calculate standard enthalpiesof formation. Finally, you will compare the results of thetwo calculations.The calorimetry data is from an experiment involvinga bomb calorimeter. During the experiment, the thermalenergy released by the substance in the calorimeter istransferred directly to the calorimeter rather than to water.The quantity of energy transferred is determined using9bomb Cbomb X ATwhere Chomb is the heat capacity of the calorimeter in J/°C.SKILLSHANDBOOKAPurposeTo compare the experimental value of the enthalpy ofcombustion of ethanol with that derived from calculationsbased on enthalpies of formation for ethanol, water, andcarbon dioxide.A2.4Procedure1. Determine the enthalpy of combustion per mole ofethanol using the experimental data in Table 1.Table 1 Data from Combustion of Ethanol in a Bomb CalorimeterMass of ethanol3.26 gHeat capacity of calorimeter11.7 kJ/°CInitial temperature of calorimeter21.5 °CFinal temperature of calorimeter29.4 °C2. Determine the enthalpy of combustion per mole ofethanol using the standard enthalpies of formation inTable 2.estioning• Researching• Hypothesizing• PredictingTable 2 Standard Enthalpies of FormationSubstance• PlanningControlling Variables• Performing• ObservingH₂O(1)CO₂(g)C₂H5OH(1)SKILLS MENU• Analyzing• Evaluating• CommunicatingAH, (kJ/mol)-285.8-393.5-235.2Analyze and Evaluate(a) Calculate the percent difference between thevalues you calculated in Steps 1 and 2. Explain anydiscrepancy between the two methods. K/U TAApply and Extend(b) Ethanol is commonly used as a fuel for cars and forheating homes. Based on your results, explain whyethanol makes a good fuel. K/UA(c) Calculate the enthalpy of combustion for ethanolusing bond energies and compare it with the othervalues. K/U™/I

Burning some materials at high temperatures is referred to as combustion. A gaseous material (smoke)…

Answered: Curator makes a goo (c) Calculate the…

Curator makes a goo (c) Calculate the enthalpy of combustion for ethanol using bond energies and compare it with the other values. K/U™A

Human Anatomy & Physiology (11th Edition)

11th Edition

ISBN:9780134580999

Author:Elaine N. Marieb, Katja N. Hoehn

Publisher:Elaine N. Marieb, Katja N. Hoehn

Chapter1: The Human Body: An Orientation

Section: Chapter Questions

Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...

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