Everything about Endergonic totally explained
Endergonic means absorbing energy in the form of work. Its etymology stems from the suffix
-ergonic as derived from the Greek root
ergon meaning
work, combined with the prefix
end- as derived from the Greek root
en meaning
put into. By thermodynamic standards, work, a form of
energy, is defined normally to move from the
surroundings (the external region) to the
system (the internal region). Thus, an endergonic process, as contrasted with an
exergonic process, is one where the system absorbs energy from the surroundings. Subsequently, during an endergonic process energy is
put into the system. If the transformation occurs at constant pressure and temperature:
∆G > 0. An
endergonic reaction is a
chemical reaction that absorbs energy in the form of work.
An endergonic reaction is essentially the opposite of an exergonic reaction. Since endergonic reactions require energy, they form molecular bonds, which decreases entropy. These bonds are energy carriers, so the formation of these bonds requires some energy input.
'Cold packs,' which become cold after mixing two liquids, exploit this property. In fact, a common reaction which is clearly endergonic is the mixing of
ammonium chloride and water. There is a net drop in temperature of the reaction as a result of the
solvation of
Ammonium ion.
Further Information
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