(7.6) Aluminum oxide decomposes to aluminum and oxygen gas by the following reaction. Al2O3(s) 2Al(s) + 3/2 O2(g) → A Hrxn = 1676 kJ Is this reaction endothermic or exothermic? [Choose ] [Choose ] 1676 kJ If 1.049 moles of aluminum was formed by the reaction, how much heat (kJ) would be involved? 440 kJ endothermic 1760 kJ 879 kJ exothermic
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.
![(7.6)Aluminum oxide decomposes to aluminum and oxygen gas by the following reaction.
Al2O3(s)- → 2Al(s) + 3/2 O2(g)
A Hrxn 1676 kJ
=
Is this reaction endothermic or exothermic?
[Choose ]
[Choose
1676 kJ
If 1.049 moles of aluminum was formed by the reaction,
how much heat (kJ) would be involved?
440 kJ
endothermic
1760 kJ
879 kJ
exothermic](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fc0d9066b-5fdf-42a6-b05e-754bdfae176c%2Fc0deeeea-363c-4f76-abc3-dd33b019ea4c%2Fya7mkx5_processed.jpeg&w=3840&q=75)
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