a. The 03 molecule has a central oxygen atom bonded to two outer oxygen atoms that are not bonded to one another. Draw the Lewis electron-dot diagram of the 03 molecule. Include all valid resonance structures. b. Based on the diagram you drew in part (a), what is the shape of the ozone molecule? Ozone decomposes according to the reaction represented below C. 2 03(g) →3 02(g) AH = 285 kJ/molrxn The bond enthalpy of the oxygen-oxygen bond in 02 is 498 kJ/mol. Based on the enthalpy of the reaction represented above, what is the average bond enthalpy, in kJ/mol, of an oxygen-oxygen bond in 03?
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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