Aluminum Forms a Layer of Aluminum Oxide When Exposed to Air

question 64

Multiple Choice

Aluminum forms a layer of aluminum oxide when exposed to air which protects the bulk metal from further corrosion. 4Al(s) + 3O₂(g) $\to$ 2Al₂O₃(s)
Using the thermodynamic data provided below, calculate $\Delta$ S° for this reaction.

• A)182.3 J/K·mol
• B)131.5 J/K·mol
• C)-182.3 J/K·mol
• D)-626.2 J/K·mol
• E)-802.9 J/K·mol

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Definitions:

Amnion

A thin membrane forming a closed sac around the embryo in amniotes, containing the amniotic fluid, which provides a protective environment.

Gastrula

An early stage in embryonic development that follows the blastula, characterized by the formation of germ layers.

Archenteron

is the primary gut that forms during early embryonic development in animals, leading to the formation of the digestive tract.

Allantois

An embryonic membrane in birds, reptiles, and mammals that is involved in gas exchange and the collection of waste products.