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.
![Fourth ionization
energy
Sixth lonization
Fifth ionization energy
energy
4355.5 kJ/mol
16,091 kJ/mol
19,805 kJ/mol
Below are the first six ionization energies of an unknown main group element.
Third ionization
energy
First ionization energy
Second ionization
energy
786.5 kJ/mol
1577.1 kJ/mol
3231.6 kJ/mol
Based on this data, which of the following elements are most likely to be the unknown element?
C
Ge
x 2008 o
K
Si
Na
0000000
Bri](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F9eecc5f2-2cf9-428a-b7a8-3316ca8b0d9e%2F03ba60b8-6e84-4894-bce4-8f6a7b305c08%2Frqe62_processed.png&w=3840&q=75)
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