11.) Use the following data to calculate the enthalpy of formation of strontium chloride.The enthalpy of sublimation of strontium = + 164 kJ/molFirst ionization energy for strontium = + 549 kJ/molSecond ionization energy for strontium = + 1064 kJ/molThe enthalpy of dissociation of dichlorine = + 343 kJ/molThe electron affinity of chlorine, Cl = - 349 kJ/molLattice energy of strontium chloride = - 3150 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.
11.) Use the following data to calculate the enthalpy of formation of strontium chloride.
The enthalpy of sublimation of strontium = + 164 kJ/mol
First ionization energy for strontium = + 549 kJ/mol
Second ionization energy for strontium = + 1064 kJ/mol
The enthalpy of dissociation of dichlorine = + 343 kJ/mol
The
Lattice energy of strontium chloride = - 3150 kJ/mol
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