5. Use the data in the following tables and answer the following questions. a) The experimental data (table 1.) is from the combustion of ethanol in a bomb calorimeter. Use the data to determine the enthalpy of combustion per mole of ethanol. The quantity of energy transferred to the calorimeter can be solved using the equation Qbomb = Chomb* AT b)Use the standard enthalpies of formation (Table 2) to determine the enthalpy of combustion per mole of ethanol. c) Explain any discrepancies (2 reasons) between the values calculated in questions a. and b. Table 1 Data from Combustion of Ethanol in a Bomb Calorimeter Mass of ethanol 3.26 g Heat capacity of calorimeter 11.7 kJ/°C Initial temperature of calorimeter 21.5°C Final temperature of calorimeter 29.4 °C Table 2 Standard Enthalpies of Formation Substance H₂O( CO₂(g) C₂H₂OH() AH, (kJ/mol) -285.8 -393.5 -235.2

5. Use the data in the following tables and answer the following questions. a) The experimental data (table 1.) is from the combustion of ethanol in a bomb calorimeter. Use the data to determine the enthalpy of combustion per mole of ethanol. The quantity of energy transferred to the calorimeter can be solved using the equation Qbomb = Chomb* AT b)Use the standard enthalpies of formation (Table 2) to determine the enthalpy of combustion per mole of ethanol. c) Explain any discrepancies (2 reasons) between the values calculated in questions a. and b. Table 1 Data from Combustion of Ethanol in a Bomb Calorimeter Mass of ethanol 3.26 g Heat capacity of calorimeter 11.7 kJ/°C Initial temperature of calorimeter 21.5°C Final temperature of calorimeter 29.4 °C Table 2 Standard Enthalpies of Formation Substance H₂O( CO₂(g) C₂H₂OH() AH, (kJ/mol) -285.8 -393.5 -235.2

Chemistry

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...

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