Review I nstant The standard heat of formation of CaBr2 is -675 kJ/mol. The first ionization energy of Ca is 590 kJ/mol and its second ionization energy is 1145 kJ/mol. The heat of sublimation of Ca [Ca(s) → Ca(9)] is 178 kJ/mol. The bond energy of Br2 is 193 kJ/mol, the heat of vaporization of Br2 (1) is 31 kJ/mol, and the electron affinity of Br is -325 kJ/mol. Part A Calculate the lattice energy of CaBr2. Express your answer using four significant figures. ? E = kJ/mol
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.
![I Review I Constants I Periodic Table
The standard heat of formation of CaBr2 is -675
kJ/mol. The first ionization energy of Ca is 590
kJ/mol and its second ionization energy is 1145
kJ/mol. The heat of sublimation of
Ca [Ca(s) → Ca(g)] is 178 kJ/mol. The bond
energy of Br2 is 193 kJ/mol, the heat of
vaporization of Br2 (1) is 31 kJ/mol, and the
electron affinity of Br is -325 kJ/mol.
Part A
Calculate the lattice energy of CaBr2-
Express your answer using four significant figures.
?
E =
kJ/mol
Submit
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