EA1 of oxygen = -141 EA2 of oxygen = 744 IE1 of calcium = 590 IE2 of calcium = 1145 enthalpy of sublimation for calcium = 178 Enthalpy of formation for calcium oxide = -634.9 bond energy of oxygen gas = 498 calculate the lattice energy of CaO, and draw the Born-Haber cycle.
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.
EA1 of oxygen = -141
EA2 of oxygen = 744
IE1 of calcium = 590
IE2 of calcium = 1145
enthalpy of sublimation for calcium = 178
Enthalpy of formation for calcium oxide = -634.9
bond energy of oxygen gas = 498
calculate the lattice energy of CaO, and draw the Born-Haber cycle.
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