/hen exposed to air, aluminum metal, Al, reacts with oxygen, O2, to produce a protective coating of luminum oxide, Al203, which prevents the luminum from rusting underneath. The balanced eaction is shown here: 4Al+302 2A2O3
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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![When exposed to air, aluminum metal, Al, reacts
with oxygen, O2, to produce a protective coating of
aluminum oxide, Al2 O3, which prevents the
aluminum from rusting underneath. The balanced
reaction is shown here:
4Al + 302→2Al2 O3](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F96930223-2706-4a0c-8418-82be04381154%2Fbad5b99e-f155-44b7-b49a-4bc1980cd43c%2Fmohphmr_processed.jpeg&w=3840&q=75)
![Part A
What is the theoretical yield of aluminum oxide if 2.60 mol of aluminum metal is exposed to
2.25 mol of oxygen?
Express your answer with the appropriate units.
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Value
Units](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F96930223-2706-4a0c-8418-82be04381154%2Fbad5b99e-f155-44b7-b49a-4bc1980cd43c%2Fovfztlq_processed.jpeg&w=3840&q=75)
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