MISSED THIS? Watch IWE: Calculating Hrxn from Bond Energies; Read Section 10.10. You can click on the Review link to access the section in your eText.. Ethane burns in air to form carbon dioxide and water vapor via the following reaction: 2H3 C CH3(g) +702(g) → 4CO2(g) + 6H₂O(g) Some average bond energies are summarized in the following table: Bond C-H C-C C-O O-H 0=0 C=0 C=0 in CO₂ Bond energy (kJ/mol) 414 347 360 464 498 736 799 Part A Use average bond energies given in the table to calculate AHxn for the reaction. Express your answer as an integer with the appropriate units. AHrxn = Submit μA Value Request Answer < Return to Assignment kJ Provide Feedback ?
Thermochemistry
Thermochemistry can be considered as a branch of thermodynamics that deals with the connections between warmth, work, and various types of energy, formed because of different synthetic and actual cycles. Thermochemistry describes the energy changes that occur as a result of reactions or chemical changes in a substance.
Exergonic Reaction
The term exergonic is derived from the Greek word in which ‘ergon’ means work and exergonic means ‘work outside’. Exergonic reactions releases work energy. Exergonic reactions are different from exothermic reactions, the one that releases only heat energy during the course of the reaction. So, exothermic reaction is one type of exergonic reaction. Exergonic reaction releases work energy in different forms like heat, light or sound. For example, a glow stick releases light making that an exergonic reaction and not an exothermic reaction since no heat is released. Even endothermic reactions at very high temperature are exergonic.
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