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.
![Temperature
120
LEG 'E
LEG 'D
tabla t
pe
000
Orm with temperatur
05
09
40
300
(69
LEG 'B'
008
000
009
LEG A'
at is the botie
000
000
Heat in Calories
According to the diagram, during a phase change the temperature -
F increases
TO
G decreases
H fluctuates
Jremains constant
adua alrt to in
ce occnie s
1ub (cepa)
300 90
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