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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![Which one below is not true for defects
in ionic solids? *
Cation interstitial
Cation vacancy
Anion vacancy
Electroneutrality exists when there are
equal numbers of anions and cations.
It is highly improbable that there would
be appreciable concentrations of anion
interstitials because anions are
relatively large, and to fit into small](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F6d2c0183-a7af-493b-92f3-d665352a8791%2F9f5ea9b9-7193-4cc8-bf0f-5d216dd6a610%2Fan7xwb_processed.jpeg&w=3840&q=75)
![Electroneutrality exists when there are
equal numbers of anions and cations.
It is highly improbable that there would
be appreciable concentrations of anion
interstitials because anions are
relatively large, and to fit into small
interstitial positions, substantial strains
on the surrounding ions must be
introduced.
Because the atoms exist as charged
ions, when defect structures are
considered, conditions of
electroneutrality must be maintained.
Both vacancies and interstitials are
possible; however, because ceramic
materials contain ions of at least
two kinds, defects for both cations and
anions may occur.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F6d2c0183-a7af-493b-92f3-d665352a8791%2F9f5ea9b9-7193-4cc8-bf0f-5d216dd6a610%2Fmhx5ago_processed.jpeg&w=3840&q=75)
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