**Problem 5:**Write a balanced thermochemical equation for the heat of combustion of gaseous ethylene, \( \text{C}_2\text{H}_4 \), given the following enthalpies of formation (kJ/mol):- \(\text{C}_2\text{H}_4 (g)\): 52.3- \(\text{H}_2\text{O} (l)\): -285.8- \(\text{CO}_2 (g)\): -393.5**Solution:**To address this problem, you need to write a balanced chemical equation for the combustion of ethylene, then calculate the heat of the reaction using the provided enthalpies of formation.**Step 1: Write the balanced chemical equation:**The combustion of ethylene involves its reaction with oxygen to produce carbon dioxide and water. The balanced equation is:\[ \text{C}_2\text{H}_4 (g) + 3\text{O}_2 (g) \rightarrow 2\text{CO}_2 (g) + 2\text{H}_2\text{O} (l) \]**Step 2: Calculate the heat of combustion:**The heat of the reaction (\(\Delta H_{rxn}\)) can be calculated using the enthalpies of formation (\(\Delta H_f^\circ\)):\[\Delta H_{rxn} = \left[ 2 \times \Delta H_f^\circ (\text{CO}_2) + 2 \times \Delta H_f^\circ (\text{H}_2\text{O}) \right] - \left[ \Delta H_f^\circ (\text{C}_2\text{H}_4) \right]\]Substituting the given values:\[\Delta H_{rxn} = \left[ 2 \times (-393.5) + 2 \times (-285.8) \right] - [52.3]\]\[\Delta H_{rxn} = \left[ -787.0 - 571.6 \right] - 52.3\]\[\Delta H_{rxn} = -1358.6 - 52.3\]\[\Delta H_{rxn} = -1410.9 \, \

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5. Write a balanced thermochemical equation for the heat of combustion of gaseous ethylene, C2H4, given the following enthalpies of formation (kJ/mol): C2H4 (g), 52.3; H20 (I), -285.8; and CO2 (g), -393.5.

5. Write a balanced thermochemical equation for the heat of combustion of gaseous ethylene, C2H4, given the following enthalpies of formation (kJ/mol): C2H4 (g), 52.3; H20 (I), -285.8; and CO2 (g), -393.5.

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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